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27 Cards in this Set
- Front
- Back
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Epithelial tissue
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-tightly fitted cells to make a sheet of cells.
-The sheets attatch to one another by a basement membrane. -Forms the outer layer of skin and linings of tracts. -Protection, absorbtion, secretion & sensation. -1 or 2 layers in glands. |
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Exocrine glands
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secrete onto epithelial surface, through a duct.
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Endocrine glands
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release hormones into interstitial fluid (tissue fluid) or blood.
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Connective tissue
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-threadlike, microscopic fibers scattered thruout a matrix: thin gel of polysaccarides that the cells secrete.
-3 types of fibers: collagen, elastic, reticular |
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Collagen fibers
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-collagen: group of fibrous proteins
very tough |
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Elastic fibers
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stretched by force & returns to original
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Reticular fibers
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thin branched fibers that form networks connecting tissues.
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Fibroblasts
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connective tissue cells that produce fibers
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Loose connective tissue
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-thin filling b/t body parts
-nerves, bv, & muscles are wrapped in this tissue. |
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Dense connective tissue
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-found in the skin
-strong & less flexible than loose connective tissue. -Tendons & Ligaments |
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Tendons
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-dense connective tissue
-cords that connect muscles to bones |
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Ligaments
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-dense connective tissue
-cables that connect bones to one another |
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Elastic connective tissue
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-stretch and return to original
-lung tissue and artery walls |
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Reticular connective tissue
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interlacing reticular fibers.
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adipose tissue
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store fat and release it when feul is needed
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Bone
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-vertebrate skeletal tissue
-contains calcium phosphate -large central marrow cavity |
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Blood & lymph
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circulating tissues
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Muscle tissue
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3 types:
skeletal, cardiac, smooth muscle |
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skeletal muscle
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large muscle masses attatched to the bone
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cardiac muscle
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main tissue of the heart
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smooth muscle
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walls of organs and tracts
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Nervous tissue
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controls muscles & glands
-neurons: receiving & transmitting signals -glial cells: support & nourish the neurons |
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neuron
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-cell body: nucleus
-Dendrites: cytoplasmic extensions specialized for receiving impulses -axon: transmits nerve impulses |
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Thermoregulation
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ability to maintain body temperature w/in certain limits
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Ectotherms
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body temp based on environment. heat comes from sun. survive on less food and convert energy to growth & reproduction.limits activity.
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Endotherms
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constant body temp. active. heat comes from metabolic processes. hypothalamus reg. temp.
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Hypothalamus
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body temp falls:
-sweating reduced -blood away from skin -muscle activity (shiver) body temp rises: -sweating -blood to skin, so heat loses -muscle activity reduced. |
