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401 - Tissues

Honors

TermDefinition
tissue - A group of similar cells that perform the same function.
organ - group of tissues that work together to perform closely related functions
organ system - group of organs that work together to perform a specific function
the four tissue types - epithelial, connective, muscle, nervous
epithelial tissue - covers and lines ex: the outer layers of the skin are epithelial tissue; the lining of the digestive system is epithelial tissue
connective tissue - provides support for your body and connects all its parts A key characteristic is an extensive extracellular matrix
extracellular matrix - the substances in between cells the fluid portion of blood, in which the blood cells are suspended, is an extracellular matrix
Examples of connective tissue - bone, cartilage, tendons, ligaments, adipose tissue, and blood
muscle tissue - A body tissue that contracts or shortens, making body parts move
nervous tissue - A body tissue that carries electrical messages back and forth between the brain and every other part of the body
simple epithelial tissue - single layer of cells
stratified epithelial tissue - multiple layers of cells
squamous - flat
cuboidal - cube shaped
columnar - column shaped
function of simple squamous epithelium - permits diffusion lines capillaries and alveoli
function of stratified squamous epithelium - protects underlying tissues in areas subjected to abrasion does not permit diffusion ex: the outer layer of the skin, the lining of the esophagus
function of simple cuboidal and columnar epithelium - secretes and absorbs ex: the lining of the intestines
interstitial fluid - fluid between cells
skeletal muscle - striated and voluntary connected to bones
smooth muscle - not striated involuntary not connected to bones found in walls of digestive system and arteries ex: peristalsis
cardiac muscle - Involuntary muscle tissue found only in the heart.
tendon - Connects muscle to bone
ligament - Connects bone to bone ex: ACL
Neuron - nervous system cells capable of sending electrical messages
dendrites - Branchlike parts of a neuron that are specialized to receive information.
axon - the "tail" of a neuron that carries nerve impulses away from the cell body
Created by: Mr. Ford
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