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21 Cards in this Set
- Front
- Back
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Endoskeleton
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Internal skeleton made up of hardened components such as bones.
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Axial Skeleton
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Of vertebrates, bones of the head, trunk, and tail.
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Appendicular Skeleton
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Of vertebrates, limb or fin bones and bones of the pelvic and pectoral girdles.
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Vertebral Column
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Backbone.
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Vertebrae
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Bones of the backbone, or vertebral column.
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Intervertebral Disk
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Cartilage disk between two vertebrae.
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Osteoblast
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Bone-forming cell; it secretes a collagen-rich matrix that becomes mineralized.
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Osteocyte
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A mature bone cell; former osteoblast that has become surrounded by its own secretions.
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Osteoclast
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Bone-digesting cell; i secretes enzymes that digest bone's matrix.
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Red Marrow
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Bone marrow that makes blood cells.
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Yellow Marrow
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Bone marrow consisting mainly of fat; fills cavity in most adult long bones.
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Joint
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Region where bones meet.
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Ligament
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Strap of dense connective tissue that holds bones together at a joint.
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Bursa
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Fluid-filled sac that functions as a cushion between components of some joints.
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Tendon
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Strap of dense connective tissue that connects skeletal muscle to bone.
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Muscle
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A band or bundle of fibrous tissue in a human or animal body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
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Muscle Fiber
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Contractile cell that runs the length of a muscle.
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Myofibril
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Of a muscle, threadlike protein structure consisting of contractile units (sarcomeres) arranged end to end.
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Sarcomere
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Contractile unite of muscle.
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Motor Unit
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One motor neuron and the muscle fibers it controls.
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Myoglobin
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Muscle protein that reversibly binds and stores oxygen.
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