Organs are composed of tissues which are made of cells. There are four main types of tissues - epithelial tissue which covers and protects the body, nervous tissue which controls body functions, muscular tissue which enables movement, and connective tissue such as bone, cartilage and fibrous tissue which provide structure and support to the body.

3. Organs are composed of tissues, which are in
turn composed of cells.

4.  Epithelial tissue
Nervous tissue
Muscular tissue
Connective tissue

5. It covers and protects the body
It lines the inner walls of the digestive tract
It performs functions such as protection,
absorption and production of secretions

6. It controls and coordinates physiological
functions
 It enables to respond identifying the changes
inside and out side the body

7. It consists of cells that can contracts and regain
the original state
It enables the movement of the body

8. Bone & Cartilage Provide support, protection and a definite shape
of the body
Fibrous Tissue connects other tissues
Blood carries out conduction of the materials and makes the body
resistant to the diseases