BIO E121 Lecture Notes - Lecture 19: Central Canal, Diaphysis, Fetus

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14 Sep 2020
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List the components that can be found in bone and their function. Resilient due to strands of elastic protein collagen. Discuss how an embryo"s skeleton varies from an adult"s embryo. Because it can undergo cell division; keeping us with growing fetus. Starts forming at 6 weeks of birth (gestation) All fetus bones have red blood cells. Compact bone: dense & hard bone tissue. Fibrous connective tissue ligaments: connect bone to bone tendons: connects muscles to bone. Only long bones have red blood cells. All fetal bones have red blood cells. Compare and contrast compact bone to spongy bone. Dense outer layer with little internal space. Forms diaphysis (shaft) in long bones / thin layer of all epiphyses (end) Found in concentric rings lamella within spaces called lacuna. Nutrients/waste travels through blood vessels in the central canal & perforating canals. Higher composition found in some smaller bones and in the epiphyses (end) of long bones.

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