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HESI: HISTOLOGY

Cell Tissues

TermDefinition
NERVE CELLS NEURONS
Body of neuron SOMA
Carry info to soma DENDRITES
Send info from soma AXON
place where 2 neurons meet SYNAPSE
STEM CELLS unspecialized, undifferentiated cells; great potential for regeneration
Differentiate to become more specialized
HUMAN EMBRYONIC STEM CELLS cells of developing embryos; differentiate into embryonic tissues
4 Primary Tissue Types Epithelial, Connective, Muscular, Nervous
covers or lines parts of body e.g. outside skin or lining of digestive tract Epithelial Tissue
how epithelial layers adheres to underlying layers Basement Membrane
connects most superficial layer (Epidermis) to underlying DERMIS Basement Membrane of Epidermis
How is Epithelial Tissue Classified Shape of Cells @ Free Surface; # of Layers Present
CELL SHAPES SQUAMOUS, CUBOIDAL, COLUMNAR
CELL LAYERS SIMPLE, STRATIFIED, PSEUDOSTRATIFIED
FLATTENED CELL SQUAMOUS
SINGLE LAYER CELL SIMPLE
Cells Stacked in More Than One Layer STRATIFIED
Cells in 1 Layers (appears to be many layers) PSEUDOSTRATIFIED
cells are held together @specific regions DESMOSOMES
hold cells even more closely together TIGHT JUNCTIONS
connect 1 cell to another; allows ions & other solutes to pass from one cell to another; GAP JUNCTIONS
What do Gap Junctions allow? COMMUNICATION
MUSCLE TISSUE cells contract & shorten in length
cells of skeletal muscle FIBERS
STRIATED, VOLUNTARY SKELETAL MUSCLE
STRIATED, BRANCHED, INVOLUNTARY, INTERCALATED CARDIAC MUSCLE
NONSTRIATED, INVOLUNTARY SMOOTH MUSCLE
NERVOUS TISSUE Tissue of brain, spinal cord, ganglia, & peripheral nerves
Conductive Cells of Nervous Tissue NEURONS
NEURONS receive & transmit electrochem impulses
Created by: msxmas