, INTRODUCTION
Tissues are groups of similar cells that work together to perform specific functions in the body. They
can be classified into four primary types based on their structure and
function: epithelial, connective, muscle, and nervous tissue.
TYPES
Epithelial Tissue:
Epithelial tissue is one of the four primary types of tissues in the body, characterized by
closely packed cells with minimal extracellular matrix. It plays crucial roles in protection,
absorption, secretion, and sensation. Epithelial tissues are classified based on two main
criteria: the shape of the cells and the number of cell layers.
Classification Based on Cell Shape
Epithelial cells can be categorized into three primary shapes:
1. Squamous Epithelium:
Description: These are thin and flat cells resembling scales.
Function: Their structure facilitates diffusion and filtration processes.
Example Locations: Alveoli of lungs, lining of blood vessels (endothelium), and serous
membranes.
2. Cuboidal Epithelium:
Description: These cells are cube-shaped, with equal height and width.
Tissues are groups of similar cells that work together to perform specific functions in the body. They
can be classified into four primary types based on their structure and
function: epithelial, connective, muscle, and nervous tissue.
TYPES
Epithelial Tissue:
Epithelial tissue is one of the four primary types of tissues in the body, characterized by
closely packed cells with minimal extracellular matrix. It plays crucial roles in protection,
absorption, secretion, and sensation. Epithelial tissues are classified based on two main
criteria: the shape of the cells and the number of cell layers.
Classification Based on Cell Shape
Epithelial cells can be categorized into three primary shapes:
1. Squamous Epithelium:
Description: These are thin and flat cells resembling scales.
Function: Their structure facilitates diffusion and filtration processes.
Example Locations: Alveoli of lungs, lining of blood vessels (endothelium), and serous
membranes.
2. Cuboidal Epithelium:
Description: These cells are cube-shaped, with equal height and width.
