Types of Tissue Flashcards
squamous (epithelial)
flat and thin; attached to each other like tiles
allows for rapid passage of substances
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
cuboidal (epithelial)
thick cube or hexagon shaped
used for secretion or absorption
columnar (epithelial)
tall and cylindrical
used form secretion or absorption
transitional (epithelial)
readily change shape from flat to cuboidal and back
Psuedostratified
looks like multiple layers but all cells rest on basement membrane
stratified
two or more layers of cells
connective tissue
one of the most abundant and widely distributed types of tissues in body
two basic elements: extracellular matrix and cells
fibroblasts (connective)
large, flat, with branching process
secrete molecules that form the matrix
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
fixed macrophages
remain in certain tissues and organs of the body
wandering macrophages
leave the blood and migrate to infected tissue
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
mast cells (connective)
abundant alongside blood vessels
produces histamine
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
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
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
cardiac muscle tissue
only found in the heart
tissue is striated when examined under a microscope
involuntary
contractions pump blood throughout the entire body
nervous tissue
also called neurons or nerves cells
cell body (nervous)
houses the nucleus; essential for survival of neuron
dendrites (nervous)
usually short processes or extensions which transmit impulses toward the cell body (input)
axons (nervous)
usually long process that transmits impulses away from the cell body neuroms, muscle fibers, glands, or cells (output)
