Animal Tissues (Epithelial)

Epithelial tissue

Tightly packed cells that form continuous layers. Usually covers the body surface.

Secretion, absorption, excretion, filtration.

Simple epithelial tissue

Single layer of cells.

Simple squamous

Thin and flattened cells. In the linings of blood vessels and air sacs of lungs.

Simple cuboidal

Box shaped cells. In the linings of kidney tubules and other various organs where absorption of minerals and other substance takes place.

Simple columnar

Rectangular pillars/columns with nuclei located near the bottom of each cell. In the linings of the digestive tract. Efficiency absorbs nutrients from the small intestines and oviduct with the help of microvilli.

Microvilli

Tiny finger-like projections. For locomotion.

Stratified epithelial tissue

2 or more layers of cells. Nose, mouth, esophagus, anal canal, and vagina are lined with this kind of cells.

Grandular epithelial tissue

Cells that secrete molecules. Unicellular or multicellular.

Unicellular

Goblet cells. (Within the columnar epithelium lining of digestive tract.)