BIOL 243 Lecture Notes - Lecture 9: Bone Remodeling, Osteoclast, Epicondyle
28 Sep 2016
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Perichondrium surrounds: dense ct tissue girdle. All contain chondrocytes in lacunae and extracellular matrix. Articular, costal, respiratory, nasal cartilage: elastic cartilage. Appositional growth= cells secrete matrix against external face of existing cartilage o. Interstitial growth= chondrocytes divide and secrete new matrix, expanding cartilage from within o. Calcification of cartilage: occurs during normal bone growth. Youth and old age: hardens, but calcified cartilage isn"t bone. Divided into 2 groups: axial skeleton. Long axis of body; skull, vertebral column, rib cage: appendicular skeleton. Bones of upper and lower limbs; girdles attaching limbs to axial skeleton. Lone bones: longer than they are wide; limbs. Short bones: cube shaped bones (in wrist and ankle, sesamoid bones (within tendons; eg. patella, vary in size and number in diff individuals. Flat bones: thin, flat, slightly curved, sternum, scapula, ribs, most scull bones. Irregular bones: complicated shapes, vertebrae, coxal bones. Support: for body and soft organs. Protection: for brain, spinal cord, and vital organs.
