BPK 142- Midterm Exam Guide - Comprehensive Notes for the exam ( 33 pages long!)

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Provides a supporting framework for the body. Provides attachment points for muscles creating a lever system that enables body movement. Red bone marrow produces red and white blood cells and platelets. The major building blocks of bone are calcium carbonate, calcium phosphate, collagen fibers and water. Collagen is a protein that is the main organic constitute of connective tissue. Bone tissue is composed of widely separated cells, called osteocytes surrounded by matrix. The matrix is about 25% water and 25% protein and 50% mineral salts. During bone growth osteocytes around a blood vessel, lay down bone matrix (lamella) in a concentric fashion to form the basic building block of bone: the osteon. Bone is highly dynamic and is continually being remodeled in response to mechanical stress or even absence of stress. The remodeling is caused by a continual process of bone breakdown (resorption) in osteoclasts and bone formation in osteoblasts.

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