ANT 3520 Lecture Notes - Lecture 9: Coronal Plane, Sagittal Plane, Transverse Plane
8 Jul 2016
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Document Summary
Osteoblasts: bone forming cell which lays down bone; evident with trauma or disease in the bone- do ossification; take calcium and phosphate and deposits it onto the bone to compose bone matrix intertwined with blood vessels. Osteocyte: matured osteoblasts trapped in the bone. Osteoclast: bone cell responsible for removal or resorption of bone cells to make space for new bone. Protects vital organs, produces blood, self reproduces and restores. Exoskeletons made of chitin or calcium carbonate. Endoskeleton- skeletons within bodies allow bigger size and more movement. Humans have 206 bones; teeth don"t count as bone. Skull composed of 8 plates; 14 facial bones. Andres van wesel-- andres vesalius; father of osteology, did research and found that teachings of romans concerning skeletons was grossly inaccurate; introduced human dissection- de humani corporis fabrica. Most new bone tissue starts as cartilage- forms from chondrytes. Tribecular bone contains marrow and fat types: hematopoesis and blood stem cells.
