Question

name 4 types of epithelial tissues

Answer 1

Epithelial Tissue

Epithelial tissue is a single or many layers of cell. It consists of a free surface and a basement membrane. The basement membrane lies on a non cellular layer and underneath lies the connective tissue. The free surface is either present externally or internally,which provides support and protection

Epithelial tissue is classified into the following:

Squamous Epithelium

• Cells are flattened and polygonal in shape
• They have a nucleus present in the centre
• It is called as Pavement Membrane
• Urethra of males and females

Cuboidal Epithelium

• Cells are cuboidal in shape
• The nucleus lies in the periphery
• Present in kidney tubules and bronchioles
• There are also known as brush border epithelium due to the fact that the free surface of the tissue may contain cilia

Columnar Epithelium

• The cells are long and slender
• The nucleus may be circular or spherical in shape
• Stomach and small intestine

Ciliated Epithelium

• Cuboidal or Columnar cells bearing cilia on their membrane
• Oviduct of the female reproductive system

Glandular Epithelium

• The epithelial tissue surrounding glands
• There may be a cell,a tissue or an organ functioning as gland
• Testes of male reproductive system

Psedostratified Epithelium

• Cells are columnar
• They are single layered but appear as if they are multilayered tissue
• Long cells have spherical nucleus while small cells have oval nucleus

Answer 2

Answer:

Types of Epithelial tissue:

It is classified into:

1. Simple epithelium:

Epithelial tissue which is only one cell thick is known as simple epithelium.

It is further classified into:

a. Simple Squamous Epithelium

b. Simple Columnar Epithelium

c. Simple Cuboidal Epithelium

d. Simple Ciliated Epithelium

e. Simple Glandular Epithelium

2. Compound or Stratified epithelium:

Epithelium composed of several layers is called compound epithelium or stratified epithelium.