Respiratory System of Toad

Respiratory System of Toad:

Energy is necessary for different metabolic activities. Usable energy is produced inside cells by oxidation-reduction of glucose with the help of mitochondria. Water, CO2, generally ATP (Adenosine Tri-Phosphate) and heat are produced by this process. Cells can not use heat energy, so it is lost. ATP instantly supplies energy when it is needed. It should be kept in mind that in extensive heat, protoplasm gets paralyzed. For these reasons, the cellular respiration process takes place step by step with the help of the various type of enzymes.

This process of energy generation inside cells is known as internal or cellular respiration. For this oxygen is essential. The process of collecting oxygen from the environment to every cell of the body is known as external respiration. In this process, the body receives oxygen enriched air and expels CO2 from the body.


Cellular respiration process of metabolic activities of all organisms is same, among these the main metabolic path is Kreb’s Cycle. To live in different habitats of environments, toads respire through different methods of external respiration.

To live in different environments, the toad respires in more than Generally, the process of external respiration in toad is of four types.

  1. Cutaneous respiration
  2. Bucco- pharyngeal respiration
  3. Pulmonary respiration
  4. Gill respiration