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Anatomy 2

Tissue Level of Organization

TermDefinition
tissue group of similar cells with common function
pathologist examines tissue and looks for changes in it
epithelial tissue covers surfaces, lines hallow organs, forms glands
connective tissue material (matrix) found between cells, supports/protects, stores fat
muscle tissue cells shorten to generate physical motion, generates body heat
nerve tissue conduct electrical signals, coordinate body activities through nerve impulses
What tissue is derived from endoderm germ layers? epithelial
What tissue is derived from mesoderm germ layers? epithelial, connective, and muscle tissue
What tissue is derived from ectoderm germ layers? epithelial and nerve tissue
biopsy removal if living tissue for microscopic examination
cell junctions points of contact between neighboring membranes
tight junctions web-like strands of transmembrane proteins (claudins and occludins)
adherens junctions belt junction, common in tissues subjected to friction and stretching (cadherins)
desmosomes junctions spot junction, resists cell separation under tension (cadherin)
hemidesmosomes junctions resemble half of a desmosome, links to basement membrane (integrin)
gap junctions connects cells with tubes for communication (connexins)
skeletal muscle cells are long cylinders with multiple nuclei, striated, involuntary and voluntary
cardiac muscle cells are branched with one nuclei, striated, involuntary
smooth muscle spindle shaped cells with one nuclei, involuntary
nerve tissue made of neurons and neuroglial cells
neuron cell structure dendrites, cell body, axon hillock, and axon
dendrites receive signals (multiple of them)
Created by: bellai
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