BIOL 2221 Lecture Notes - Lecture 5: Bone Marrow, Medullary Cavity, Epiphyseal Plate
Document Summary
Short - cubed shape: ex - sesamoid: short bone that develops with one or more tendons; ex - patellar. Irregular: everything, skeletal gross anatomy, types of bone, compact: solid/smooth, outer layer. Between the diaphysis and each epiphysis of an adult bone. Periosteum- the outside layer: endosteum - inside layer, medullary cavity- in diaphysis, yellow bone marrow - marrow in medullary cavity stores fat ix. Sex hormones - sex hormone at puberty which accelerate growth: promote growth spurt, but later the hormone induces epiphyseal closure, ending longitudinal bone growth, longitudinal (elongated) - bone growth happens at epiphyseal plate, resting zone. Incomplete - bone is not broken through: compound vs. simple - if bone ends penetrate the skin or not, compound - if bone ends penetrate the skin. Simple - bone ends don"t penetrate skin: osteoporosis - degenerative disorder, definition - bone resorption outweighs bone deposit, bone matrix is normal, but mass declines, risk factors.
