The Head And Neck #2

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Anonymous
ID:
277171
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The Head And Neck #2
Updated:
2014-06-19 00:11:12
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Anatomy Chapter Seven
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Doctor J, Cross words, CCRI
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  1. This structure is the bony portion of the roof of the oral cavity. It is formed anteriorly by the palatine process of the two maxillary bones and posteriorly by the horizontal plates of the two palatine bones. Functionally it is important because it separates the nasal cavities from the oral cavity. this separation is important to keep food out of the air passages, and it also is essential to form suction as when drinking with a straw.
    Hard Palate
  2. This structure is made up of four major cartilages and houses the vocal cords. Functionally it is important because it connects the pharynx with the trachea and produces sound. It extends between C4 and C6. Superiorly it is attached to the hyoid by the thyroid ligament, and inferiorly it is continuous with the trachea.
    Larynx
  3. This structure separates the nasal cavities and is covered by mucous membranes on both sides. Its anterior is composes of septal cartilage and separates the external nares. its posterior separates the external nares. Its posterior separates the internal nares and is composed of two bones: the vomer inferiorly and the perpendicular plate of the ethmoid bone superiorly
    Nasal Septum
  4. This is the single bone of the face. It articulates with the mandibular fossa of the temporal bone, and irritation of this joint leads to the condition known as TMJ syndrome. When we were in  nursery school we called it the lower jaw. it has a number of landmarks associated with it including: rami, alveoli, coronoid and condyloid processes, body and mandibular ( sigmoid ) notch. It also houses two important foramina, the mandibular and mental foramina. We find that it is actually two bones in the fetus.
    Mandible
  5. This is the narrow part of the pulp cavity that is primarily within the root of the tooth. it is occupied by the pulp.
    Root Canal
  6. This muscle, which is the prime elevator ( closer ) of the mandible, originates on the inferior margin of the zygomatic arch. It inserts on the mandible. In the Cat it is partly covered by the parotid salivary gland. The dorsal and ventral facial nerves bracket the muscle in the cat as well.
    Masseter Muscle
  7. This bone does not articulate with any other bones. It is held in place by ligaments to the styloid process of the temporal bone and the thyroid cartilage of the larynx. It also has muscle attachments. In spite of the fact that it is not attached to the skull, it is considered part of the axial skeleton, specifically part of the skull. It has a shape similar to the mandible, suggesting a common origin. Functionally it is important because it is the origin of muscles that move the larynx during the act of swallowing.
    Hyoid Bone
  8. This cavity extends from the outside to the oropharynx. it contains the tongue and teeth
    Mouth
  9. This landmark is part of the temporal bone. It is the insertion for the sternocleidomastoid muscle. In Fact, it is this muscle that causes this landmark to develop. Several other muscles that you will not be  responsible for also attach to this landmark. As a group these muscles are responsible for rotation or extension of the head
    Mastoid Process
  10. This organ is primarily a fibrous connective tissue membrane that surrounds all bones, except at the articular surfaces where articular cartilage is formed. This layer has the ability to produce or remove bone tissue from the surface of the bone, and is responsible for the increase in the diameter of bones as they grow longer. It has nerves incorporated in its structure, which is why a broken bone hurts so much. It also has a blood supply of the bone with which it is associated. This organ is attached to the bone by rootlets. This is important because the tendons from muscles actually attach to it,  not the bone surface. This type of connective tissue becomes the periodontal membrane of teeth and joint capsules of synovial joints
    Periosteum

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