HLSC 1200U Lecture Notes - Lecture 11: Medullary Cavity, Bone, Hyaline Cartilage
Document Summary
Support: form framework of body: muscles, nerves, tissues to attach to skeleton, shape, alignment, positioning of body part. Protection: bony bones protect delicate tissue (ex. skull, ribcage, vertebrae) Movement: bones with joints make levers that move as muscles contract. Hematopoiesis blood formation : myeloid tissue found in red bone marrow in spongy bone, erythropoiesis (rbc formation), leucopoiesis (wbc formation) Difference between flat vs long bone: flat bone does not have distinct end and middle portions, no epiphyseal line, no epiphysis, no medullary cavity, no diaphysis, no medullary cavity (no yellow bone marrow) Diaphysis: l: shaft of long bone, s: hollow, cylinder shape thick compact, f: provide strong strength with heavy weight. Epiphyses: l: bone ends of long bone, spongy with rbm, s: bulbs made up of cancellous bone, f: provide attachment for muscles to provide stability to joints, blood cell production for rbm.
