February 15 - February 15, 2008 Skin is your external...

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February 15, 2008 Skin is your external support: tone, texture Chapters 7, 8 (Appendicular skeleton), 9 (articulations) Internal support Fig 7.1, 8.1, table 9.1 (3 kinds of joints in skeletal system) Chapter 7 Axial Skeleton A. Skeletal system 1. Axial skeleton (fig 7.1 what bones and how many) a. Central axis i. Head (in addition to skull) ii. Vertebral column iii. Rib cage/ Thoracic cage 2. Appendicular skeleton (chapter 8) a. Bones of appendages, bones that hold the limbs to the trunk Arms, legs, shoulders and pelvic girdle that support them Axial Skeleton Fig. 7.4 skull anterior (bold printed only) 1. Frontal forms the forehead and roofs of the orbits; superior and anterior parts of skull 2. Parietal forms superior/roof of cranium and lateral walls of skull a. Each has 4 sutures to unite to neighboring bones 3. Temporal is lateral to eyes and inferior to parietal=inferior lateral walls and part of the floor of cranium (inferolateral wall of skull) 4. Sphenoid hidden by superficial bones, articulates with frontal, parietal, and temporal bones (anterior to temporal); contains sphenoid sinuses, extends to form greater and lesser wings; 5. Ethmoid are basically the sinuses; positioned between orbits; forms anteromedial floor of cranium, roof of nasal cavity, part of medial wall of each orbit, and part of nasal septum
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6. Lacrimal (smallest) forms part of medial wall of each orbit; articulates with nasal bone anteriorly and with ethmoid bone posteriorly 7. Nasal forms the bridge of the nose; lateral edge articulates with medial edge of maxilla 8. Vomer has a triangular shape, articulates along its midline with maxillae and palatine bones; forms inferior and posterior parts of the bony nasal septum 9. Inferior nasal concha are along the lateral walls of nasal cavity and scroll-shaped a. Help create turbulence in inhaled air 10. Maxilla (right and left) form most of the upper jaw, hard palate, and lateral boundaries of nasal cavity and also help to form inferior (the floor) of each orbit 11. Mandible forms the lower jaw a. Supports the lower teeth and provides attachment for muscles of mastication 12. Zygomatics are the cheek bones and form part of lateral wall of each orbit and cheeks; important for ethnic reasons 13. Occipital forms the posterior region of the skull and part forms the base of the cranium 14. Palatine are small with a distinct L shape; forms posterior part of the hard palate, small part of nasal cavity, and orbit wall 1. Cranial (around cranium) bones 8 surround and enclose the brain 1. Unpaired ethmoid, frontal, occipital, and sphenoid 2. Paired parietal and temporal 3. Sutural bone 2. Facial bones Form the face Protect entrances to the digestive and respiratory systems Attachment for facial muscles 1. Nasal 2. Lacrimal 3. Maxilla
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4. Zygomatics
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February 15 - February 15, 2008 Skin is your external...

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