CHAPTER 7 Axial Skeleton

CHAPTER 7 Axial Skeleton - Appendicular skeleton composed...

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CHAPTER 7 AXIAL SKELETON Skeleton forms a framework, protection for organs, bear the body’s weight, movement. 206 bones in adult skeleton (but can vary) A large number of bones present at birth, but this number decreases with maturation as some fuse. Skeletal system divided into 2 parts: Axial skeleton —composed of bones along the central axis of body. (divides into 3 regions: skull, vertebrae column, thoracic cage) Main function is to form a framework and supports/protects organs. Also houses special sense organs (hearing, balance, taste, small, vision) and provides attachment sites for skeletal muscles. Spongy bone of axial skeleton has hemopoietic tissue (blood cell formation)
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Unformatted text preview: Appendicular skeleton composed of appendage bones (upper and lower limbs) and the bones that hold these limbs to the trunk (pectoral and pelvic girdles) I. SKULL A. Basic description i. Skull is composed of cranial and facial bones 1. Cranial bones form the round cranium that encloses the brain. Composed of 8 bones: unpaired ethmoid, frontal, occipital, sphenoid bones and the paired parietal and temporal bones. Also has attachment sites for jaw, head, neck muscles. 2. Facial bones form the face and protect entrances to the digestive and respiratory systems. Also provides attachment sites for muscles B. Views of the Skull and Landmark Features...
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