Body systems - Skeletal System: The skull- the bony...

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Skeletal System: The skull- the bony framework of the head. It is comprised of the eight cranial and fourteen facial bones. The mandible is the lower jawbone and is the only freely moveable joint in the head. It provides the chewing motion. The sternum forms the rib cage that protects the heart, lungs, and major blood vessels from damage. The ribs are thin, flat, curved bones that form a protective cage around the organs in the upper body. They are comprised 24 bones arranged in 12 pairs. The cervical vertebrae form a flexible framework for the neck and support the head. The thoracic vertebrae move with the ribs to form the rear anchor of the rib cage . lumbar vertebrae support most of the body's weight and are attached to many of the back muscles. The tibia bears most of the weight, while the fibula serves as an area for muscle attachment. The sacrum forms the back wall of the pelvic girdle and moves with it. The humerus is the longest bone in the upper extremity. The ulna is longer than the radius and connected more firmly to the humerus. The radius contributes more to the movement of the wrist and hand
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This note was uploaded on 09/25/2010 for the course BIOL 1362 taught by Professor Loeblich during the Spring '08 term at University of Houston.

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Body systems - Skeletal System: The skull- the bony...

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