ORGANS AND SYSTEMS 





                                 ORGANS OF THE BODY


 An organ is a group of tissues arranged in a certain way to carry out a specific function e.g. stomach, heart, kidneys. The human body is a highly developed multicel oly lular organism containing various organs which perform different functions. The organs are again grouped to and gether to form systems.

 SYSTEMS OF  THE BODY 

A system is a group of organs which together carry out one of the essential functions of the body.

The following are some important systems. 


1. Skeletal system: It is formed by bones. It provides a frame work for the body.Also, it protects the soft tissues and allows movements at joints.


 2. Muscular system: It is made of numerous muscles. It effects movements of the body as a whole. 


3. Circulatory system: It includes heart, blood vessels and blood. This system carries oxygen and nutrients to various tissues of the body.


 4. Respiratory system: It consists of air passages and the lungs. It allows exchange of gases between the body and the environment. 


5. Digestive system: It consists if alimentary canal. It is concerned with digestion and absorption of food and elimination of waste materials.


 6. Endocrine system: It consists of ductless glands. It is concerned with the production of hormones which regulate a variety of functions of the body.

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