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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.

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Respiratory Organs in Animals

Various organsinvolved inthe various types of respiration are

  1. Skin; exchange of gases through skin is called cutaneous respiration. Skin of these animals is thin, moist, highly vascular and easily permeable to gases. The atmospheric oxygen diffuses into the blood where it combines with the hemoglobin, present in plasma to form oxyhemoglobin. Oxyhemoglobin circulates in the tissues where it splits into hemoglobin and oxygen. Oxygen is used by the cells to

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