Question

Pulmonary respiration is
a. External
b. Internal
c. Cellular
d. All of the above

Answer 1

Hint: Respiration is nothing but the movement of oxygen from outside into the cells, tissues, organs and at the same time movement of carbon dioxide to the outside environment.

Complete answer:
- The respiratory system is very important or vital in all animals. Whereas organs of the respiratory system
- Works in such a way to make the oxygen to enter the body and carbon dioxide to leave the body, and pulmonary respiration includes the following
- Such as external respiration which exchange of gases takes place between alveoli and blood.
- External respiration is also called as breathing, here the transfer of respiratory gases usually takes place between the lungs which are called as repsiratoryorgnas and blood in pulmonary capillaries.
- This aspect of the exchange of gases such as oxygen and carbon dioxide in the lungs are said to be ventilation. Movement of air into and outside of the lungs has happened in ventilation.
- Whereas blood that flows in the pulmonary capillaries is said to be perfusion.For efficient gas exchange, the ventilation and perfusion are compatible.
- External respiration occurs when there is a partial pressure difference of oxygen and carbon dioxide between the alveoli and pulmonary capillaries.
- The difference in the partial pressure is usually 40mm of Hg.
- If the exchange of gases occurs in the level of body tissues is said to be internal respiration.
Cellular respiration occurs at cellular level.

So, the correct answer is external respiration

Note: Pulmonary respiration occurs in the animals having alveoli, the whole process of respiratory includes the exchange of gases from outside to body and within the body between tissues and within the cells.