EPITHELIAL TISSUE

Question 1

Who gave the term epithilial tissue ?

Answer 1

RUYSCH

Question 2

What is meaning of epithelial tissue

Answer 2

It means the tissue which grows upon another tissue(connective tissue).

Question 3

What are the main feature of epithelial tissue ?

Answer 3

1. It forms the protecting covering of outer and inner surfaces (facing towards fluid) of various organs.
2. It is avascular.
3. Cells are compactly packed with little intracellular matrix and arranged in layer on the non-cellular basement membrane.

Question 4

Name the two layers of basement membrane.

Answer 4

1. basal lamina

2. fibrous or reticular lamina

Question 5

Explain about basal lamina ?

Answer 5

It is the upper thin layer of mucopolysaccharide and glycoprotein , secreted by epithelial cell.

Question 6

Explain about fibrous or reticular lamina ?

Answer 6

It is the lower thick layer of collagen fiber and reticular fiber of connective tissue supplied by “blood vessels- which provide nutrients to epithelial tissue by simple diffusion.

Question 7

Name the two classification of epithelial tissue on the basis of no. of layer present.

Answer 7

1. Simple epithelium (single layered)
   - present in the lining of the ducts , body cavities and tubes.
2. Compound epithelium (multi layered)
   - present in the skin

Question 8

The inner most layer of the compound epithelium which rest upon connective tissue is known as ?

Answer 8

STRATUM GERMINETIVUM (meiotically produced new layer)

Question 9

What is the general function of simple epithelium ?

Answer 9

Diffusion , secretion , absorption etc.

Question 10

What is the general function of compound epithelium ?

Answer 10

Protection against mechanical and chemical stresses.

Question 11

name the types of simple epithelium.

Answer 11

1. simple squamous epithelium
2. simple cuboidal epithelium
3. simple columnar epithelium
4. ciliated epithelium
5. pseudo stratified epithelium
6. specialized epithelium
   
   • neuro sensory epithelium
   • glandular epithelium