SCI 106 System Gen, Axial Skeleton OK

SCI 106 System Gen, Axial Skeleton OK - Skeletal System...

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Skeletal System Generalities Axial Skeleton
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Axial Skeleton Includes the bones that form the axis of the body (vertebral column) as well as the head, neck and trunk bones
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Axial Skeleton A) Skull: Facial Bones Cranial Bones Auditory Ossicles B) Hyoid Bone C) Vertebral Column (vertebrae) D) Thorax (ribs and breast bone)
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6A
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Appendicular Skeleton Includes the bones of the upper and lower extremities and the girdles which attach them to the axial skeleton
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Pectoral Girdle
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Pelvic Girdle
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Appendicular Skeleton Upper Extremities: arms Pectoral Girdle: shoulder Lower Extremities: legs Pelvic Girdle: hip
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Functions of the Bones Shape and form to the body Support: lower limbs “support” trunk Protection: skull – encloses brain vertebrae – surround cord rib cage – protects heart, lungs, great vessels
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Functions of the Bones Movement: “levers” onto which muscles are attached. Due to the joints • Mineral Storage: Ca and PO 4 released as needed (hydroxyapatites) Blood Cell Formation: Hematopoiesis occurs in red marrow (RBC, WBC, platelets)
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Structure of a Long Bone 3A
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Hematopoiesis In the adult, the only active red marrow is found in the spongy bone of: head of femur head of humerus vertebrae pelvis flat bones
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Hematopoiesis In the adult, the rest of spongy bone plus the
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This note was uploaded on 03/30/2008 for the course SCI 106 taught by Professor Abdirkin during the Fall '07 term at St. Thomas FL.

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SCI 106 System Gen, Axial Skeleton OK - Skeletal System...

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