Epithelial Tissue

Epithelial Tissue

Tissue that covers outside of the body and lines organs and cavities.

Simple Squamous Epithelium

Single layer of flattened cells.

Found in areas where simple diffusion

occurs - alveoli, capillaries

Stratified squamous epithelium

Has many cell layers.

Found in the outer portion of the skin and

in body orifices

Simple cuboidal epithelium

Single layer of cube-shaped cells attached

to a basement membrane.

Lines most of the kidney tubules where it

absorbs and secretes substances

Simple columnar epithelium

Cells are longer than they are wide

Lines digestive organs and the uterine

tubes

Pseudostratified columnar epithelium

Appears to have more than one layer of

cells, but only has one true layer

Each cell touches the basement

membrane

ciliated columnar epithelium

Lines the respiratory tract

protect movement of mucus and sex cells

Transitional epithelium

Changes in response to tension from

cuboidal to squamous cells

Located in urinary bladder, the ureters,

and part of the urethra

Avascular

without blood vessels

Endocrine Gland

a ductless gland that secretes hormones directly into the bloodstream

Exocrine gland

gland that releases its secretions through tubelike structures called ducts

simple epithelial tissue

single layer of cells

stratified epithelial tissue

multiple layers of cells

squamous

flat cells

cuboidal

cube shaped cells

Columnar cells

tall and column shaped

keratinized

found on skin surface, abrasion and water resistant

characteristics of epithelial tissue

Closely packed cells, high mitotic rate, avascular, free surface, basement membrane