PHYSCI 107 Lecture Notes - Lecture 5: Temporal Bone, Crista Galli, Frontal Sinus
12 Nov 2020
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Document Summary
Vitamin a and vitamin c: provide support for osteoblasts, various hormones, growth hormone, thyroid hormone, sex hormones, calcium-balancing hormones (p t h and calcitonin) Remodeling process recycles and renews organic and mineral components of bone matrix: osteocytes maintain matrix, continually removing and replacing calcium salts, osteoclasts continually remove matrix, osteoblasts continually build matrix, normally activity is balanced. Rate of remodeling varies with age and type of bone: in young adults, nearly 1/5 of the skeleton is recycled and replaced each year, spongy bone remodeled more frequently than compact. Skeletal divisions: skeletal system consists of 206 bones, two divisions, axial skeleton, skull rib cage, spinal column, 2. Appendicular skeleton: appendages, pectoral and pelvic girdles attached to arms and legs. Axial skeleton: forms longitudinal axis of body, contains 80 bones subdivided into, skull bones (8 cranial bones and 14 facial bones) The bones associated with the skull (6 ossicles, or ear bones, and the hyoid bone)
