Ch. 4 tissues

Microscopic study of the structure of tissues

Group of similar cells and their intercellular substance joined together to perform a specific function

Scientist who who specializes in laboratory studies of cells and tissues to help physicians make accurate diagnosis

Covers body surfaces; lines body cavities, hollow organs, and ducts (tubes); and forms glands

Most epithelial cells and some muscle and nerve cells are tightly joined into functional units by points of contact between their plasma membranes called

Refers to the most superficial layer of cells

Refers to deepest layer of cells

Without blood; lack blood vessels

Cells that are flat and attach to each other like tiles

Cells that are as tall as they are wide

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

Production and release from a cell or a gland of a physiologically active substance

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

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

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

Goblet shaped unicellular gland that secretes mucus; present in epithelium of the airways and intestines

The thick fluid secretion of goblet cells, mucous cells, mucous glands, and mucous membranes

An insoluble protein found in the hair, nails, and other keratinized tissues of the epidermis

Specialized epithelial cell or cells that secrete substance; may be exocrine or endocrine

Cells that are taller than they are wide and protect underlying tissues