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Anatomy and Physiology of Domestic Animals

Veterinary Science 135
EPITHELIUM

 

Epithelial tissue covers body surfaces, lines body cavities, and forms glands.

 

I. Functions

A. Protection

B. Selective Absorption

C. Secretion

II. Features

A. Consists entirely of cells

B. Does not contain blood vessels

C. Capable of reproduction

III. Covering and Lining Epithelium

A. Simple
1. Squamous

2. Cuboidal

3. Columnar

4. Pseudostratified columnar

B. Stratified

1. Squamous
a. Keratinized

b. Non-keratinized

(2. Cuboidal)

(3. Columnar)

4. Transitional

IV. Glandular Epithelium

A. Endocrine Glands

B. Exocrine Glands

1. Simple
a. Tubular

b. Alveolar

2. Compound

a. Tubular

b. Alveolar

c. Tubuloalveolar

 

C. Methods of Secretion
1. Merocrine

2. Apocrine

3. Holocrine

 

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