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27 Cards in this Set
- Front
- Back
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axial skeleton
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part of the skeleton which include the skull and the bones that support it, vertebral column, the ribs, and sternum
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epidermis
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the outermost layer of the skin, made up of dead and living skin cells
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hair follicle
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narrow cavities of the dermis from which hair grows
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keratin
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protein in the epidermis, protects the living cell layers underneath from exposure to bacteria, heat and chemicals
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appendicular skeleton
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the part of the skeleton that include the bones of the arms and legs and structures associated with them, such as fingers and toes
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bursa
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fluid filled sacs located on the outside of the joints, which decrease the friction
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melanin
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a pigment that colors the skin and helps protect the body cells from damage by solar radiation
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compact bone
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surrounding every bone is a layer of hard bone
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joint
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where 2 or more bones meet
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ligament
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tough band of connective tissue that attaches one bone to another
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dermis
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the inner, thicker portion of the skin, contains blood vessels, hair follicles, sweat glands
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tendon
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think bands of connective tissue, attach muscles to bones
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osteocyte
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living bone cells
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skeletal muscle
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type of muscle that is attached to your bones and moves your bones
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osteoblast
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blood vessels penetrate the membrane covering the cartilage and stimulate its cells to become potential bone cells
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yellow marrow
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found in many other bones, consists of stored fat
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actin
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thinner filaments of muscle cells, which are made of protein
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cardiac muscle
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involuntary muscle which makes up the heart
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involuntary muscle
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contractions that occur in smooth muscle, not requiring any conscious control
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myofibril
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long, fused cells, which are smaller units of the muscle
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myosin
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thicker filaments of the muscle cells, which are made of protein
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sarcomere
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the functional units of the muscle, made up of sections
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spongy bone
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less dense bone, next to the dense bone, contains many holes and spaces
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sliding filament theory
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the explanation of the muscle contraction, which states the filaments slide over one another, thus shortening the muscle fiber
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smooth muscle
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muscle tissue found in the walls of your internal organs and blood vessels
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red marrow
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site where red blood cell and white blood cells are produced and cell fragments for clotting are found; located in the long bones, such as humerus, femur, sternum
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voluntary muscle
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muscle that contracts under conscious control
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