MedTerm Module1

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Pongtopeng
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218108
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MedTerm Module1
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2013-05-09 19:04:16
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Medical Terminology
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Module 1 - Chapters 1 thru 5
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  1. What is a noun suffix
    Suffix that converts the root word into a noun.
  2. What is the meaning of the Suffix word -ia?
    "Condition of"
  3. What is the meaning of the Suffix word -ism?
    "Condition of"
  4. What is the meaning of the Suffix word -sis?
    "Condition of"
  5. What is the meaning of the Suffix word -y?
    "Condition of"
  6. What is the meaning of the Suffix word -ian?
    "Specialist in a field of study"
  7. What is the meaning of the Suffix word -ist?
    "Specialist in a field of study"
  8. What is the meaning of the Suffix word -iatrics?
    "Medical specialty"
  9. What is the meaning of the Suffix word -iatry?
    "Medical specialty"
  10. What is the meaning of the Suffix word -ics?
    "Medical specialty"
  11. What is the meaning of the Suffix word -ical?
    Pertaining to.
  12. What is the meaning of the Suffix word -ory?
    Pertaining to.
  13. What is the meaning of the Suffix word -oid?
    Pertaining to.
  14. What is the meaning of the Suffix word -ous?
    Pertaining to.
  15. Words ending in A has a plural ending of? 
    What is the plural of Vertebra
    • AE 
    • Vertebrae
  16. Words ending in EN has a plural ending of? 
    What is the plural of Lumen
    • INA
    • Lumina
  17. Words ending in AX, IX, YX has a plural ending of? 
    What is the plural of Thorax
    What is the plural of Matrix
    What is the plural of Calyx
    • CES
    • Thoraces
    • Matrices
    • Calyces
  18. Words ending in MA has a plural ending of? 
    What is the plural of Stigma?
    • MATA
    • Stigmata
  19. Words ending in NX (ANX, INX or YNX) has a plural ending of? 
    What is the plural of Phalanx?
    What is the plural of Meninx
    What is the plural of Larynx?
    • NGES
    • Phalanges
    • Meninges
    • Larynges
  20. Words ending in US has a plural ending of?
    What is the plural of Thrombus?
    • I
    • Thrombi
  21. Words ending in ON or UM has a plural ending of? 
    What is the plural of Ganglion?
    What is the plural of Serum?
    • A
    • Ganglia
    • Sera
  22. Words ending in IS has a plural ending of? 
    What is the plural of Diagnosis?
    • ES
    • Diagnoses
  23. Words ending in EX has a plural ending of?
    What is the plural of Index?
    • ICES
    • Indices
  24. What is the meaning of the Suffix word -ile?
    Pertaining to.
  25. What is the meaning of the Suffix word -logy?
    "Study of"
  26. What is an adjective suffix?
    A suffix that gives attribute to or modifies/describes the root word.
  27. What is the meaning of the "Number" Prefix word Prim/i-?
    First
  28. What is the meaning of the "Number" Prefix word Mon/o-?
    One
  29. What is the meaning of the "Number" Prefix word Hemi-?
    • Half
    • One Side
  30. What is the meaning of the "Number" Prefix word Semi-?
    • Half
    • Partial
  31. What is the meaning of the "Number" Prefix word Bi-?
    • Two
    • Twice
  32. What is the meaning of the "Number" Prefix word Uni-?
    One
  33. What is the meaning of the "Number" Prefix word Di-?
    • Two
    • Twice
  34. What is the meaning of the "Number" Prefix word Diplo-?
    Double
  35. What is the meaning of the "Number" Prefix word Tri-?
    Three
  36. What is the meaning of the "Number" Prefix word Quadr/i-?
    Four
  37. What is the meaning of the "Number" Prefix word Tetra-?
    Four
  38. What is the meaning of the "Number" Prefix word Multi-?
    Many
  39. What is the meaning of the "Number" Prefix word Poly-?
    • Many
    • Much
  40. What is the meaning of the "Color" Prefix word Cyan/o-?
    Blue
  41. What is the meaning of the "Color" Prefix word Erythr/o-?
    Red
  42. What is the meaning of the "Color" Prefix word Leuk/o-?
    • White
    • Colorless
  43. What is the meaning of the "Color" Prefix word Melan/o-?
    • Black
    • Dark
  44. What is the meaning of the "Color" Prefix word Xanth/o-?
    Yellow
  45. What is the meaning of the "Negative" Prefix word A- or An-?
    • Not
    • Without
    • Lack of
    • Absence
  46. What is the meaning of the "Negative" Prefix word Anti-
    Against
  47. What is the meaning of the "Negative" Prefix word Contra-?
    • Against
    • Opposite
  48. What is the meaning of the "Negative" Prefix word De-?
    • Down
    • Without
    • Removal
    • Loss
  49. What is the meaning of the "Negative" Prefix word Dis-?
    • Absence
    • Removal
    • Separation
  50. What is the meaning of the "Negative" Prefix word In- or Im- or Non- or Un-?
    For example incontinent. (Not able control...)
    Not
  51. What is the meaning of the Prefix word In-?
    For example Inhale!
    Into
  52. What is the meaning of the "Directional" Prefix word Ab-?
    Away from
  53. What is the meaning of the "Directional" Prefix word Ad-
    • Toward
    • Near
  54. What is the meaning of the "Directional" Prefix word Dia-?
    Through
  55. What is the meaning of the "Directional" Prefix word Per-
    Through
  56. What is the meaning of the "Directional" Prefix word Trans-?
    Through
  57. What is the meaning of the "Degree" Prefix word Hyper-?
    • Over
    • Excess
    • Abnormally high
    • Increased
  58. What is the meaning of the "Degree" Prefix word Hypo-?
    • Under
    • Below
    • Abnormally low
    • Decreased
  59. What is the meaning of the "Degree" Prefix word Olig/o-?
    • Few
    • Scanty
  60. What is the meaning of the "Degree" Prefix word Pan-?
    All
  61. What is the meaning of the "Degree" Prefix word Super-?
    • Above
    • Excess
  62. What is the meaning of the "Size" Prefix word Macro-?
    • Large
    • Abnormally large
  63. What is the meaning of the "Size" Prefix word Mega- or Megalo-?
    • Large
    • Abnormally large
  64. What is the meaning of the "Size" Prefix word Micro-?
    Small
  65. What is the meaning of the "Comparison" Prefix word Equi-?
    • Equal
    • Same
  66. What is the meaning of the "Comparison" Prefix word Eu-?
    • True
    • Good
    • Easy
    • Normal
  67. What is the meaning of the "Comparison" Prefix word Hetero-?
    • Different
    • Other
    • Unequal
  68. What is the meaning of the "Comparison" Prefix word Homo- or Homeo-?
    • Same
    • Unchanging
  69. What is the meaning of the "Comparison" Prefix word Iso-?
    • Equal
    • Same
  70. What is the meaning of the "Comparison" Prefix word Neo-?
    New
  71. What is the meaning of the "Comparison" Prefix word Normo-?
    Normal
  72. What is the meaning of the "Comparison" Prefix word Ortho-?
    • Straight
    • Correct
    • Upright
  73. What is the meaning of the "Comparison" Prefix word Poikilo-?
    • Varied
    • Irregular
  74. What is the meaning of the "Comparison" Prefix word Pseudo-?
    False
  75. What is the meaning of the "Comparison" Prefix word Re-?
    • Again
    • Back
  76. What is the meaning of the "Time" Prefix word Ante-?
    • In front of
    • Before
  77. What is the meaning of the "Time" Prefix word Pre-?
    • In front of
    • Before
  78. What is the meaning of the "Time" Prefix word Pro-?
    • In front of
    • Before
  79. What is the meaning of the "Time" Prefix word Post-?
    • After
    • Behind
  80. What is the meaning of the "Position" Prefix word Dextr/o-?
    Right
  81. What is the meaning of the "Position" Prefix word Sinistr/o-?
    Left
  82. What is the meaning of the "Position" Prefix word Ec- or Ecto-?
    • Outside
    • Out
  83. What is the meaning of the "Position" Prefix word Ex/o-?
    • Away from
    • Outside
  84. What is the meaning of the "Position" Prefix word End/o-?
    • In
    • Within
  85. What is the meaning of the "Position" Prefix word Mes/o-?
    Middle
  86. What is the meaning of the "Position" Prefix word Syn- or Sym-?
    Together
  87. What is the meaning of the "Position" Prefix word Tel/e- or Tel/o-
    End
  88. What does ATP stand for?
    Adenosine TriPhosphate
  89. What does ATP do?
    It is the energy compound of a cell that stores energy for cell activity"
  90. What is cytology?
    Cytology is the study of cells.
  91. What does enzymes do?
    Enzymes speeds up the rate of a metabolic reaction.
  92. What is histology?
    Histology is the study of tissues.
  93. What is the function of the plasma membrane?
    Encloses cell contents, regulates what enters and leaves the cell, participate in growth, reproduction and interaction between cells.
  94. What is the function of a microvilli?
    Absorbs materials into the cell.
  95. What is the function of a nucleus?
    Contains the chromosomes, the hereditary unit that directs all cellular activity.
  96. What is the function of a nucleolus?
    Nucleolus makes ribosomes.
  97. What is the purpose of cytoplasm?
    The site of many cellular activity.  Consists of cytosol and organelles.
  98. What is a cytosol and its purpose?
    Cytosol is the fluid portion of the cytoplasm that surrounds the organelles.
  99. What is the function of a rough endoplasmic reticulum?
    Sorts proteins and forms them into more complex compounds.
  100. What is the function of the smooth endoplasmic reticulum?
    It synthesizes lipids.
  101. What does ribosomes do?
    Ribosomes makes proteins.
  102. What does the mitochondria do?
    Converts energy from nutrients into ATP.
  103. What does the Golgi Apparatus do?
    Sorts and prepares compounds for transport to other parts of the cell or outside of the cell.
  104. What is the function of peroxisomes?
    Breaks down harmful substances.
  105. What does vesicles do?
    Stores materials and moves them in and out of the cell.
  106. What does lysosomes do?
    It breaks down substances in the cell.
  107. What is the function of centrioles?
    Helps separate the chromosomes during cell division.
  108. What does the cilia do?
    Moves the fluids around the cell.
  109. What's the function of a flagellum?
    Moves the cell.
  110. In order, what are the 4 stages of a cell in mitosis?
    • 1. Prophase
    • 2. Metapase
    • 3. Anaphase
    • 4. Telophase
  111. What is the stage called when the cell is not in mitosis?
    Interphase
  112. What is cytotechnology
    A laboratory study of cells.
  113. What is the four forms of tissue?
    • 1. Epithelial
    • 2. Connective
    • 3. Muscle
    • 4. Nervous
  114. This type of tissue covers and protects body structures and lines organs, vessels, and cavities?
    Ephitelial
  115. This type of tissue supports and binds body structures.
    Connective
  116. This type of tissue contracts to produce movement?
    Muscle - examples include Skeletal, Cardiac and Smooth.
  117. This type of tissue makes up the brain, spinal cord, and nerves.
    Nervous
  118. what is the simplest tissue and what type does it fall under?
    Membranes are the simplest  which includes mucus.  The are glands that fall under the ephitelial type.
  119. Name 5 groups of organ functions.
    • 1. Circulation
    • 2. Nutrition/Fluid Balance
    • 3. Offspring production
    • 4. Coordination/Control
    • 5. Body structure/movement
  120. What type of body system fall under Circulation?
    • Cardiovascular System
    • Lymphatic System
  121. Cardiovascular system consist of?
    • Heart
    • Blood vessels.
  122. What does the Lymphatic system do?
    Aids circulation and help protect the body from foreign materials.
  123. What type of body systems fall under Nutrition and Fluid Balance?
    • Respiratory System
    • Digestive System
    • Urinary System
  124. What type of body systems fall under Offspring Reproduction?
    Male and Female Reproductive Systems.
  125. What type of body systems fall under Body Structure/Movement?
    • Skeletal System
    • Muscular System
  126. What type of body systems fall under Body Covering?
    • Integumentary System
    • Skin
  127. What is the purpose of the integumentary system?
    Protection and regulation of body temperature.
  128. What is Homeostasis?
    State in which the body is in internal stability.
  129. What does DNA stand for and what is it?
    DeoxyriboNucleic Acid.  The genetic compound of the cell.  It makes up the gene.
  130. What is a gene?
    A gene is a hereditary unit composed of DNA.  It combines with other genes to form the chromosomes.
  131. What is the meaning of the "Cell or Tissue" Root word Morph/o?
    Form
  132. What is the meaning of the "Cell or Tissue" Root word cyt/o or -cyte?
    Cell
  133. What is the meaning of the "Cell or Tissue" Root word Nucle/o?
    Nucleus
  134. What is the meaning of the "Cell or Tissue" Root word Kary/o
    Nucleus
  135. What is the meaning of the "Cell or Tissue" Root word hist/o?
    Tissue
  136. What is the meaning of the "Cell or Tissue" Root word fibr/o?
    Fiber
  137. What is the meaning of the "Cell or Tissue" Root word Reticul/o?
    Network
  138. What is the meaning of the "Cell or Tissue" Root word aden/o?
    Gland
  139. What is the meaning of the "Cell or Tissue" Root word papill/o?
    Nipple
  140. What is the meaning of the "Cell or Tissue" Root word myx/o
    Mucus
  141. What is the meaning of the "Cell or Tissue" Root word Muc/o?
    Mucus
  142. What is the meaning of the "Cell or Tissue" Root word somat/o?
    • Small body
    • Body
  143. What is the meaning of the "Cell Activity" Root word blast/o?
    • Immature cell
    • Productive cell
    • Embryonic cell
  144. What is the meaning of the "Cell Activity" Root word Gen?
    • Origin
    • Formation
  145. What is the meaning of the "Cell Activity" Root word Phag/o
    • Eat
    • Ingest
  146. What is the meaning of the "Cell Activity" Root word Phil?
    • Attract
    • Absorb
  147. What is the meaning of the "Cell Activity" Root word Plas?
    • Formation
    • Molding
    • Development
  148. What is the meaning of the "Cell Activity" Root word Trop?
    • Act on
    • Affect
  149. What is the meaning of the "Cell Activity" Root word Troph/o
    • Feeding
    • Growth
    • Nourishment
  150. What is the meaning of the "Body Chemistry" Suffix word -Ase?
    What is Lipase?
    • Enzyme
    • Enzyme that digests fat (Lip=fat, ase=enzyme)
  151. What is the meaning of the "Body Chemistry" Suffix word -ose?
    What is Lactose?
    • Sugar
    • Milk Sugar (Lact=Milk, Ose=Sugar)
  152. What is the meaning of the "Body Chemistry" Root word Hydr/o?
    Water or Fluid
  153. What is the meaning of the "Body Chemistry" Root word Gluc/o?
    Glucose
  154. What is the meaning of the "Body Chemistry" Root word Glyc/o?
    • Sugar
    • Glucose
  155. What is the meaning of the "Body Chemistry" Root word Sacchar/o?
    Sugar
  156. What is the meaning of the "Body Chemistry" Root word Amyl/o?
    Starch
  157. What is the meaning of the "Body Chemistry" Root word Lip/o?
    • Fat
    • Lipid
  158. What is the meaning of the "Body Chemistry" Root word Adip/o?
    Fat
  159. What is the meaning of the "Body Chemistry" Root word Steat/o?
    Fatty
  160. What is the meaning of the "Body Chemistry" Root word Prote/o?
    Protein
  161. What is an amino acid?
    Nitrogen-containing compound that make up proteins.
  162. What is the meaning of the Root word Chem/o?
    Chemical
  163. What is the meaning of the Prefix word Dys-?
    • Difficult
    • Abnormal
  164. What is the meaning of the Root word Gnath/o?
    Jaw
  165. What is the meaning of the Root word Pneumon/o?
    Lungs
  166. What is the meaning of the Suffix word -nym?
    Name
  167. What is the meaning of the Root word Rhin/o?
    Nose
  168. A root word with a vowel added to aid with pronunciation is called?
    Combining form word.
  169. A word that contains more than one root?
    Compound word
  170. What is the meaning of the Root word Gastr?
    Stomach
  171. What is the meaning of the Root word Neur?
    Nervous
  172. What is the meaning of the Root word Cardi/o?
    Heart
  173. What is the meaning of the Root word Nephr?
    Kidney
  174. What is the meaning of the Suffix word -ptosis?
    • Downward 
    • Dropping
  175. What is the meaning of the Root word Men/o?
    • Menstruation
    • Menses
  176. What is the meaning of the Suffix word -rhea?
    • Flow
    • Discharge
  177. What is the meaning of the Root word Ren/o?
    Kidney
  178. What is the meaning of the Suffix word -itis?
    Inflammation of.
  179. What is the meaning of the Root word hem/o or hemat/o?
    Blood
  180. What is the meaning of the Root word Intra-?
    • Within
    • In
  181. What is the meaning of the Root word Ot/o
    Ear
  182. laryng/o
    Larynx
  183. What is anabolism?
    Type of metabolism in which body substances are made; building phase of metabolism.
  184. What is catabolism?
    Type of metabolism in which substances are broken down for energy and simple compounds.
  185. What is collagen?
    A Fibrous protein found in connective tissue.
  186. What is a cortex?
    The outer region of an organ.
  187. What is glycogen?
    A complex sugar compound stored in liver and muscles and broken down into glucose when needed for energy.
  188. What is Interstitial?
    Between parts, such as spaces between cells in a tissue.
  189. What is medulla?
    What is the root word?
    What is the meaning of the root word?
    • Inner region of an organ.
    • Medull/o 
    • Marrow
  190. What is Parenchyma?
    The functional tissue of an organ.
  191. What is parietal?
    Pertaining to the wall.  Describes a membrane that lines a body cavity.
  192. What is Soma?
    The Body.
  193. What is Stem Cell?
    An immature cell that has the capacity to develop into any or variety of different cell types.  A precursor cell.
  194. What is Visceral?
    Pertaining to the internal organs.  Describes a membrane on the surface of an organ.
  195. What is an anatomic position?
    Location or direction of a given point in the body.
  196. Frontal Plane divides the body between what two parts?
    Anterior and Posterior parts.
  197. Anterior parts and posterior parts are divided by this type of plane?
    Frontal plane.
  198. Sagittal plance divides the body into what two parts?
    Left and right parts.
  199. What does midsagittal mean?
    When the plane passes through the midline of the body.
  200. What is another word for midsagittal?
    Medial plane.
  201. The body is separated by Left and Right by this plane?
    Sagittal
  202. The transverse plane divides the body between what two parts?
    Superior and inferior.
  203. The body is separated into Superior and Inferior by this plane?
    Transverse plane.
  204. Name the two main Body Cavity?
    Dorsal and Ventral.
  205. What are the two cavities contained in the Dorsal Cavity?
    Cranial and Spinal cavity.
  206. What are the cavities contained in the Ventral Cavity?
    Thoracic, Abdominal, and Pelvic.
  207. What large membrane that lines the abdominopelvic cavity (Abdominal and Pelvic cavity has no anatomic separation).
    Peritoneum.
  208. Anatomic direction toward the front of the body (belly)?
    Anterior
  209. Anatomic direction toward the back of the body (dorsum)?
    Posterior
  210. Anatomic direction toward the midline of the body?
    Medial
  211. Anatomic direction toward the side of the body?
    Lateral
  212. Anatomic direction nearer to the point of attachment or to a given referencing point?
    Proximal
  213. Anatomic direction farther form the point of attachment or from a given referencing point?
    Distal
  214. Anatomic direction above or in a higher positon?
    Superior
  215. Anatomic direction below or in a lower position?
    Inferior
  216. Anatomic direction toward the head
    Cranial
  217. Anatomic direction toward the lower end of the spine?
    Caudal (tail in Latin = Cauda).
  218. Anatomic direction closer to the surface of the body?
    Superficial (external)
  219. Anatomic direction closer to the center of the body?
    Deep (internal)
  220. This abdominal region is located above the stomach?
    Epigastric
  221. This abdominal region is named for the navel?
    Umbilical
  222. This abdominal region is located below the stomach?
    Hypogastric.
  223. What are the two abdominal regions next to the epigastric region?
    Right and left hypochondriac regions.
  224. What are the two abdominal regions next to the umbilical region?
    Right and left lumbar region
  225. What are the two abdominal regions next to the  hypogastric region?
    Right and left iliac region.
  226. What are the four quadrants of the abdomen?
    • RUQ = Right Upper Quadrant
    • LUG = Left Upper Quadrant
    • RLQ = Right Lower Quadrant
    • LLQ = Left Lower Quadrant
  227. What are the anatomic adjectives found in the Head (anterior view)?
    • Cranial (Skull)
    • Frontal (Forehead)
    • Ocular (Eye)
    • Facial (Face)
    • Oral (Mouth)
  228. What are the anatomic adjectives found in the Head (posterior view)?
    • Parietal (Crown)
    • Occipital (Base of the skull)
    • Cervical (Neck)
  229. What are the anatomic adjectives found in the Upper Extremity (anterior view)?
    • Thoracic (Chest)
    • Mammary (Breast)
    • Axillary (Armpit)
    • Brachial (Arm)
    • Antebrachial (Forearm)
    • Antecubital (Elbow)
    • Umbilical (Navel)
    • Inguinal (Groin)
    • Pubic (Pubis)
    • Carpal (Wrist)
    • Palmar (Hand or Palm)
    • Phalangeal (Fingers)
  230. What are the anatomic adjectives found in the Upper Extremity (posterior view)?
    • Acromial (Shoulder)
    • Deltoid (Lateral Shoulder)
    • Scapular (Shoulder blade)
    • Lumbar (Small of back)
    • Lateral Abdominal (Flank)
    • Sacral (Sacrum)
    • Iliac (Hip)
    • Gluteal (Buttock)
  231. What are the anatomic adjectives found in the Lower Extermity (anterior view)?
    • Femoral (Thigh)
    • Patellar (Kneecap)
    • Crural (Leg)
    • Tarsal (Ankle)
    • Pedal (Foot)
    • Phalangeal (Toes)
  232. What are the anatomic adjectives found in the Lower Extermity (posterior view)?
    • Popliteal (Back of knee)
    • Sural (Calf)
    • Plantar (Sole of foot)
  233. What is the meaning of the "Region Of The Head and Trunk" Root word Cephal/o?
    Head
  234. What is the meaning of the "Region Of The Head and Trunk" Root word cervic/o?
    Neck
  235. What is the meaning of the "Region Of The Head and Trunk" Root word Thorac/o?
    • Chest
    • Thorax
  236. What is the meaning of the "Region Of The Head and Trunk" Root word abdomin/o?
    Abdomen
  237. What is the meaning of the "Region Of The Head and Trunk" Root word Celi/o?
    Abdomen
  238. What is the meaning of the "Region Of The Head and Trunk" Root word Lapar/o?
    Abdominal Wall
  239. What is the meaning of the "Region Of The Head and Trunk" Root word Lumb/o?
    • Lumbar Region
    • Lower Back
  240. What is the meaning of the "Region Of The Head and Trunk" Root word Peritone/o or Periton?
    Peritoneum
  241. What is the meaning of the "Extremities" Root word Acro?
    • Extremity
    • End
  242. What is the meaning of the "Extremities" Root word Brachi/o?
    Arm
  243. What is the meaning of the "Extremities" Root word Dactyl/o?
    • Finger
    • Toe
  244. What is the meaning of the "Extremities" Root word Ped/o?
    Foot
  245. What is the meaning of the "Extremities" Root word Pod/o?
    Foot
  246. What is the meaning of the "Position/Direction" Prefix word Circum-?
    Around
  247. What is the meaning of the "Position/Direction" Prefix word Peri-?
    Around
  248. What is the meaning of the "Position/Direction" Prefix word Intra-?
    • In
    • Within
  249.  What is the meaning of the "Position/Direction" Prefix word Epi-?
    • On
    • Over
  250. What is the meaning of the "Position/Direction" Prefix word Extra-?
    Outside
  251. What is the meaning of the "Position/Direction" Prefix word Infra-?
    Below
  252. What is the meaning of the "Position/Direction" Prefix word Sub-?
    • Below
    • Under
  253. What is the meaning of the "Position/Direction" Prefix word Inter-?
    Between
  254. What is the meaning of the "Position/Direction" Prefix word Juxta-?
    • Near
    • Beside
  255. What is the meaning of the "Position/Direction" Prefix word Para-?
    • Near
    • Beside
  256. What is the meaning of the "Position/Direction" Prefix word Retro-?
    • Behind
    • Backward
  257. What is the meaning of the "Position/Direction" Prefix word Supra-?
    Above
  258. Define Digit or Digital?
    A finger or toe
  259. Define epigastrium?
    The epigastric region
  260. Define Fundus?
    • The base or body of a hollow organ
    • The area of an organ farthest from its opening
  261. Define Hypochondrium?
    The hypochondriac region (left or right)
  262. Define Lumen?
    The central opening within a tube or hollow organ
  263. Define Meatus?
    A passage or opening
  264. Define Orifice?
    The opening of a cavity
  265. Define Os?
    • Mouth
    • Any body opening
  266. Define Septum?
    A wall dividing two cavities
  267. Define Sinus?
    A cavity, as within a bone.
  268. Define Sphincter?
    A circular muscle that regulates an opening.

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