What are the functions of respiratory system?


The main functions of respiratory system are given as under:

  1. To exchange oxygen and carbon dioxide between the air and blood.
  2. To produce sound, it helps vocal chords to produce sound.
  3. To regulate blood Ph.
  4. To protect against some microorganism. Respiratory system blocks the entry of microorganism in the body at various levels, thus it provides protection against harmful microorganisms like virus, bacteria, etc.


Name any four physiological systems of human body.


  1. Skeletal System
  2. Muscular System
  3. Digestive System
  4. Respiratory System

Define anatomy.


Anatomy is the study of the structure of human body. The term anatomy comes from Greek words: ANA means apart and TOMY means to cut. It is because anatomy was first obtained from dissection.


Define skeletal system.


The skeletal system is the bony framework of our body. It consists of all the bones of the body. It supports the body and gives it a shape.


Define physiology.


Physiology is the study of the functions of human body. In other words, physiology is the science of mechanical, physical, bioelectrical, biochemical functions of human organs and the cells of which they are composed of.


What do you mean by joint?


Joint is the place at which two or more bones meet in the skeleton of the body. Joint may be fixed or movable.