BIOL 240 Lecture Notes - Lecture 8: Intramembranous Ossification, Endochondral Ossification, Hyaline Cartilage
Document Summary
And in the middle if spongey bone: called diploe. Red bone marrow found in flat bones. Shaft of bone: going to call it diaphysis. Tips of bones /ends of the bone: epiphysis. Between diaphysis and epiphysis: called metaphysis. Cavity in the middle: called medullary cavity, depending on age, going to be filled with bone marrow, children, red bone marrow found here, adults, red bone marrow turns into fatty tissue, yellow bone marrow. Most of the epiphysis and metaphysis made of spongey bone. At the tip of the ends of the bones: articular cartilage, cartilage that is in contact with the other bones. Ossification: begins by 4th (cid:449)eek of pre(cid:374)atal de(cid:448)elop(cid:373)e(cid:374)t till early 20"s. Endochondral ossification: develops from models of hyaline cartilage, most skeleton develops this way. Intramembranous ossification: develops from mesenchyme, some bones of skull, clavicles, sesamoid bones. Most of bones go from mesenchyme cartilage bone: called endochondral ossification. When go from mesenchyme directly to bone: called intramembranous ossification.