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process of removing tissue sample from patients surgically or with a needle for diagnostic purposes
examination of the organs of a dead body to determine the cause of death or to study the changes caused by disease
epithelial tissue (epithelium)
tissue that covers and protects surfaces both inside and outside the body; mostly composed of cells; nonvascular
specialized type of extracellular material secreted by epithelial and connective tissue cells; helps attach the cells to the underlying tissue and plays an important role in supporting and guiding cell migration during tissue repair
protecting underlying structures
acting as a barrier
permitting the passage of substances
major functions of epithelial tissue
enclosing and separating other tissues
connecting tissues to one another
supporting and moving parts of the body
cushioning and insulating
major functions of connective tissue
adipose cell (adipocyte)
contains large amounts of lipid; the lipid pushes the rest of the cell contents to the periphery
cell that commonly lies beneath membranes in loose connective tissue and along small blood vessels and organs; contain chemicals that are released in response to injury, trauma and infection
white blood cell (leukocyte)
cell that continuously moves from blood vessels into connective tissues; movement increases dramatically in response to injury or infection
derived from from monocytes; phagocytizes foreign and injured cell; play a major roll in protecting against infection; can be either fixed or wandering
fragments of hemopoetic cells containing enzymes and special proteins that function in the clotting process to reduce bleeding from a wound
undifferentiated mesenchymal cell
typical adult stem cell that persists in connective tissue; has the potential to form multiple cells
protein fibers that consist of very fine collagen fibers; very short, thin fibers that branch to form a networks that fill spaces between organs
protein fibers that consist of elastin; have the ability to return to the original shape after being stretched or compressed
constituted mostly by hyaluronic acid and proteoglycans; background against which collagen fibers are microscopically examined
long, unbranched polysaccharide chain composed of repeated disaccharide units; gives a slippery quality to fluids
large molecule that consists of glycosaminoglycans; each attached by one end to a protein core
holds the proteoglycan aggregate together and to structures such as the plasma membrane
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