Anatomy: Week 3

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Author:
kmbrly423
ID:
134425
Filename:
Anatomy: Week 3
Updated:
2012-02-11 13:59:11
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Anatomy
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Description:
Integumentary
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  1. Integumentary System consists of:
    • -Skin
    • -Accessory Structures
  2. Functions of the Integumentary System: (6 of them)
    • -Protection
    • -Regulation of Temperature
    • -Storage of Lipids
    • -Synthesis of Vitamin D
    • -Sensory Reception
    • -Immune Response
  3. The integumentary system is found in:
    • -Epithelial
    • -Connective
    • -Smooth muscle
    • -Neural tissue
  4. The SKIN is also called:
    -The Cutaneous Membrane
  5. The Skin has 2 parts which are:
    -Epidermis

    -Dermis
  6. The EPIDERMIS:
    • -Composed of keratonized stratified squamous
    • -Superficial, outer-most layers
    • -Water can move through, but very slowly; not waterproof
  7. The Epidermis has 4 Cell Types which are:
    • 1. Keratinocytes
    • 2. Melanocytes
    • 3. Merkel Cell
    • 4. Langerhan Cell
  8. Keratinocytes:
    • -Produce keratin
    • -Most Numerous
    • -Carotine Storage-orange in color
  9. Melanocytes:
    • -Produce melanin (color of skin)
    • -Gives some protection against UV radiation; Need a little bit of UV exposure-our bodies need it for Vitamin D precursers
  10. Merkel Cell:
    • -Sensory Receptors
    • -Allows us to fell light touches; and pressure
  11. Langerhan Cell
    -Immune response to cancer in skin/pathogens
  12. The DERMIS:
    • -Deep the to Epidermis
    • -Has 2 layers
  13. The 2 Layers of the DERMIS are:
    1. Papillary Layer

    2. Reticular Layer
  14. The Papillary Layer:
    • -Upper portion of the dermis
    • -Projections into the Epidermis
    • -Has loose connective tissue
    • -Sensory neurons
    • -Capillary beds-where oxygen exchanges for carbon dioxide
  15. The Reticular Layer:
    • -Has dense irregular connective tissue (thats why when you pull on your skin, you're not pulling on muscle or damaging anything)
    • -Hair follicles
    • -Exocrine Glands
  16. Underneath the Dermis is the:
    -Hypodermis
  17. The HYPODERMIS:
    • -The hypodermis is NOT part of the skin
    • -Has loose connective tissue
    • -Lots of Blood and Vascular Tissue here
  18. The Accessory Structures:
    • -Hair
    • -Nails
    • -Exocrine Glands
  19. HAIR:
    -Have about 5 million hairs on the body
  20. Functions of HAIR are:
    • -Protection
    • -Thermoregulation-(layer of insulation)
    • -Arrector Pilus- smooth muscle; hair gets pulled into an upright position
    • -Early Warning System- like when a bug is on you
  21. The EXOCRINE GLANDS:
    -Sebaceous Glands

    -Sweat Glands

    -Cerumerous Glands
  22. The Sebaceous Glands:
    • -Produce an oily lipid=SEBUM
    • -Secreted out in hair follicles or surface of skin
    • -Provides lubrication
    • -Is antibacterial
    • -Has HOLOCRINE Secretions- entire cell is lost with secretion
  23. The SWEAT Glands:

    -Has 2 Types:
    1. Apocrine Sweat Glands

    2. Merocrine Glands
  24. The APOCRINE Sweat Glands:
    • -Actually merocrine secretions- exocytosis
    • -Most common type of secretion
    • -Secreting into hair follicles-arm pits, nipples, groin
    • -They're odorous- due from bacteria
    • -Acne happens when this gland get blocked
  25. The MEROCRINE Glands:
    • -Also known as ECCRINE
    • -More widely distributed
    • -Sweat- 99% water
    • -Thermoregulation
    • -Also helps to lose water
  26. The Cerumerous Glands:
    -Cerumen (ear wax)

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