NEET (NTA)-National Eligibility cum Entrance Test (Medical) Biology Human Physiology-Breathing and Respiration Revision (Page 4 of 12)

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Mammalian (Human) Respiratory System

Respiration is a process of uptake of oxygen and removal of carbon dioxide from the tissues of the body.

Functions of respiration

  • Energy. All living being require energy to carry out various activities of body. This energy is derived from the oxidation of food for oxygen is required.

  • Excretion. Respiration excretes carbon dioxide and water.

  • Maintenance of pH. Elimination of carbon dioxide maintains the acid-base balance in the body.

  • Maintenance of temperature. heat is ex

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Understanding the respiratory tract

Respiratory tract includes the following parts

Upper respiratory tract it includes the respiratory passage from nostrils up to the vocal cords.

Lower respiratory tract it includes the respiratory passage below the vocal cords

Diagram of the lower respiratory tract

Diagram of the Lower Respiratory Tract

Knowing the lower respiratory tract

  • Nostrils (external nares). Holes of the nose are called nostrils. These are a pair of slits that open in the nasal cavity.

  • Nasal cavity. Is divided into two nasal chambers by the na

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