Ch. 4 tissues Flashcards
Microscopic study of the structure of tissues
Histology
Group of similar cells and their intercellular substance joined together to perform a specific function
Tissue
Scientist who who specializes in laboratory studies of cells and tissues to help physicians make accurate diagnosis
Pathologist
Covers body surfaces; lines body cavities, hollow organs, and ducts (tubes); and forms glands
Epithelial tissue
Most epithelial cells and some muscle and nerve cells are tightly joined into functional units by points of contact between their plasma membranes called
Cell junctions
Refers to the most superficial layer of cells
Apical layer
Refers to deepest layer of cells
Basal layer
Without blood; lack blood vessels
Avascular
Cells that are flat and attach to each other like tiles
Squamous cells
Cells that are as tall as they are wide
Cuboidal cells
Microscopic, finger-like projections of the plasma membrane Ed of cells that increase surface area for absorption, especially in the small intestine and proximal convoluted tubules of the kidneys
Microvilli
Production and release from a cell or a gland of a physiologically active substance
Secretion
Intake of fluids or other substances by cells of the skin or mucous membranes; the passage of digested foods from the gastrointestinal tract into blood or lymph
Absorption
A hair or hairlike process projecting from a cell that may be used to move the entire cells or to move substances along the surface of the cell
Cilium
A passive process in which there is a net or greater movement of molecules or ions from a region of high concentration to a region of low concentration until equilibrium is reached
Diffusion
