Two main functions of Epithelial tissue
Answers
HEYA, BUDDY !!
CONCEPT :
➦ They are thin tissue that cover all the exposed surface of the body. They cover various surfaces of body parts like inner lining of mouth, digestive tract, secretory glands, lining of hollow parts of every organ such as heart, lungs, eyes, the urogenital tract, etc. The cells which form epithelial tissue are closely attached to each other through a structure called tight junctions. They don't have blood vessels and nerves and also they are supported by connective tissue called the basement membrane. They show polarity with distinct basal domains facing the basement membrane and other apical surfaces of the lumen of an organ or the external environment.
❑ The function of Epithelial tissue are :-
Secretion Process: Most of the epithelial cells have capability to produce secretive macromolecules.
Absorption Process: The Absorption process is mainly performed by surface epithelia with the help of microvilli as they increase surface area for absorption process.
❑ The Types of Epithelial Tissue are : -
Classification of epithelial tissue is mainly based on their layers, shape and functioning.
1. Classification Based on Their Shape are :-
a. Squamous Epithelium: This type of tissue has cells with wider length than their height. They are mainly found as the lining of the mouth, oesophagus, alveoli of lungs including blood vessels.
b. Cuboidal Epithelium: This type of tissue has similar width and height i.e they are mainly cube shaped.
c. Columnar Epithelium: This type of tissues are taller in height than width i.e column like shape. They are further classified into two types i.e ciliated columnar epithelium and glandular columnar epithelium.
Answer:
Epithelial tissue has a variety of functions depending on where it's located in your body, including protection, secretion and absorption