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Flashcards in Types of Tissue Deck (22)
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epithelial tissue

arranged in continuous sheets, in either single or multiple layers
functions: protection, filtration, lubrication, of digestive system, secretion, absorption, and excretion
four shapes: squamous, cuboidal, columnar, and transitional

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squamous (epithelial)

flat and thin; attached to each other like tiles
allows for rapid passage of substances

2

cuboidal (epithelial)

thick cube or hexagon shaped
used for secretion or absorption

3

columnar (epithelial)

tall and cylindrical
used form secretion or absorption

4

transitional (epithelial)

readily change shape from flat to cuboidal and back

5

Psuedostratified

looks like multiple layers but all cells rest on basement membrane

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stratified

two or more layers of cells

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connective tissue

one of the most abundant and widely distributed types of tissues in body
two basic elements: extracellular matrix and cells

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fibroblasts (connective)

large, flat, with branching process
secrete molecules that form the matrix

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macrophages (connective)

develop from monocites, a type of white blood cells
either fixed or wandering
irregular shape with short branching projections
capable of engulfing bacteria and cellular debris

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fixed macrophages

remain in certain tissues and organs of the body

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wandering macrophages

leave the blood and migrate to infected tissue

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plasma cells (connective)

small and either round or irregular
develop from a type of white blood cell called a B lymphocyte
they secret antibodies
mostly residing in the gastrointestinal and the respiratory tracts

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mast cells (connective)

abundant alongside blood vessels
produces histamine

14

muscle tissue

produces body movement - skeletal muscles allow us to walk, run, swim, etc
stabilizes body positions - skeletal muscles allow us to keep our head up stand, sit, etc
moves substances within the body

15

skeletal muscle tissue

attaches primarily to bone and it is responsible for locomotion, movement, and support of the skeleton
contractions aid flow of lymph and blood return to heart

16

smooth muscle tissue

found within the walls of internal organs of the digestive system , urinary system, and blood vessels
under a microscope this tissue looks smooth (lacks striations)
involuntary
propels urine through urinary system

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cardiac muscle tissue

only found in the heart
tissue is striated when examined under a microscope
involuntary
contractions pump blood throughout the entire body

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nervous tissue

also called neurons or nerves cells

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cell body (nervous)

houses the nucleus; essential for survival of neuron

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dendrites (nervous)

usually short processes or extensions which transmit impulses toward the cell body (input)

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axons (nervous)

usually long process that transmits impulses away from the cell body neuroms, muscle fibers, glands, or cells (output)