Classification of Epithelial Tissue

What is simple epithelia and their role

single layer of cells; absorption, secretion and filtration

What is stratified epithelia and its role

Composed of two or more layers; common in high-abrasion areas for protection

What are squamous cells

flat cells

What are cuboidal cells

cube shaped cells

What are columnar cells

Long and skinny cells (look like columns)

Where can simple squamous cells be found

Kidneys, airs sacs of lungs, lining of heart, blood vessels, and lymphatic vessels

What is the role of simple squamous cells

Allows for material to pass by diffusion and filtration; secretes lubricating substances in serosae

Whee are simple cuboidal cells found

Kidney tubules, ducts and secretory portions of small glands, ovary surface

What is the function of simple cuboidal cells

secretion and absorption

What is the function of simple columnar cells

Absorption; secretion of mucus, ezynmes, and other substances; ciliated type propels mucus

Where are simple columnar cells located

Noncilliated type lines the digestive tract, gallbladder, and excretory ducts of some glands.

Cilliated type lines small bronchi, uterine tubes, and some regions of the uterus

Where are pseudostratified columnar epithelia found

Cilliated: lines trachea and upper respiratory tract

Noncilliated: males' sperm carrying ducts and ducts of large glands

What is the endothelium

Simple squamous tissue that lines blood vessels and the heart

What is the mesothelium

simple squamous epithelium that lines the serous membrane, the membranes lining the ventral cavity and covering its organs

Where are stratified squamous epithelia found

Non-keratinized: moist linings of the mouth, esophagus, and vagina

Keratinized: epidermis of the skin

What is the function of stratified squamous epithelia

protection

What is transitional epithelia

Resembles both stratified columnar and cuboidal

What is the function of transitional epithelia

stretches as organ expands; permits stored urine to distend urinary organ

Where is transitional epithelia found

Lines the uterus, bladder, and part of the urethra