Epithelium

Pseudostratified Epithelium

Function: secretion of mucus propelled by cilia

Location: (ciliated) respiratory tract, trachea

(unciliated) Male sperm-carrying ducts

Simple Squamous Epithelium

Function: Allows for diffusion and filtration, secrets lubricating substances

Location: Air Sacs of lungs, Kidney glomeruli and corpuscles, blood & lymphatic vessels, lining of heart

Simple Cuboidal Epithelium

Function: secretion and absorption

Location: kidney tubules

Simple Columnar Epithelium

Function: Absorption, secretion of mucus, propels reproductive cells

Location: (unciliated) Digestive tract

(Ciliated) Uterine tubes

Stratified Squamous Epithelium

Function: protect underlying structures from abrasion

Location: (Non-keratinised) mouth, vagina, oesophagus

(Keratinised) Epidermis of the skin

Stratified Cuboidal Epithelium

Function: protection/structural reinforcement

Location: ducts of large excretory glands (salivary, mammary, sweat glands)

Stratified Columnar Epithelium

Function: protection and secretion

Location: male urethra, anus, salivary gland ducts, conjunctiva

Transitional Epithelium (Urothelium)

Function: distention (stretches) allowing urine to fill the bladder

Location: Urinary tract

(Not stretched) No urine or little urine

(Stretched) Full bladder