Chapter 35 Action and Support

Chapter 35 Action and Support - Chapter 35 Action and...

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Chapter 35 Action and Support Vocabulary actin antagonistic muscles – pairs of muscles that allow movement, one contracts, one extends. appendicular skeleton – bones forming the appendages and their attachment to the axial skeleton axial skeleton – bones of the head, vertebral column and rib cage bone – has a blood supply (unlike cartilage). Rings of collagen and calcium phosphate. cardiac muscle – located only in the heart cartilage – most of the skeleton starts as cartilage that hardens into bone, connective tissue chondrocyte – cells in cartilage that make up a collagen matrix, receive oxygen by diffusion endoskeleton – internal supporting elements exoskeleton – hard encasement of the surface hydrostatic skeleton – fluid under pressure in a closed body compartment joint ligament – binds bone to bone at joints motor unit muscle fiber myofibril – accumulation of proteins, many of which are in each muscle fiber myosin myosin head – allows thick filaments to connect to thin filaments
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Chapter 35 Action and Support - Chapter 35 Action and...

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