BIO 208 Study Guide - Midterm Guide: Choroid Plexus, Neuroglia, Preganglionic Nerve Fibers
1 Nov 2016
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Document Summary
Ribcage, skull, spinal column and pelvis: support. Maintaining shape, cavities and air space: leverage. Alters magnitude and direction of forces: storage of minerals and lipids. Calcuim ions (ca++: blood cell production. Red blood cells and white blood cells in marrow. Types of bone tissue: compact bone. Located on exterior surface of bones for protection. Bones with high proportion of compact bone have limited force direction, strong stress along axis of alignment: spongy bone tissue (cancellous bone) Network of struts w/ spaces for marrow. Located in interior of bones and high proportion of spongy bone in bones with multidirectional forces. Trabeculae oriented along stress lines with extensive cross bracing. Trabeculae oriented-> a series or group of partitions formed by bands or columns of connective tissue. Composition of bone: cells: approximately 2% by weight. Osteocytes: a bone cell, formed when an osteoblast becomes embedded in the matrix it has secreted. Ossification: replacement of cartilage (and other connective tissue into bone.
