Page 2 - 2- Lesson Notes- Animal Tissue- Epithelial

 The covering or protective tissues in the animal body are epithelial tissues.

 The cells of this tissue are tightly packed and it forms continuous sheet.

 Indeed cells of epithelium contain very little or no intercellular matrix.

 They lie on a delicate non-cellular basement membrane which contains a
special form of matrix protein, called collagen.

Functions

 Epithelial cells protect the underlying cells from mechanical and chemical
injuries and bacterial or viral infection.

 It covers most organs and cavities within the body. It also forms a barrier to

keep different body system separate.

 Epithelial tissues help in absorption of water and nutrients

 Epithelial tissues help in elimination of waste products.

 Some epithelial tissues secrete secretion, such as sweat, saliva etc.

Location

 The lining of the blood vessels
 The lining of the mouth

 Kidney tubules

 Skin

 Lung alveoli
Classification

SIMPLE SQUAMOUS

EPITHELIUM