Respiration

Question

Primary site of gaseous exchange in human lungs is:

RankGuru · Accepted Answer

1. **Structure of Respiratory System**: Air travels through the trachea, bronchi, and bronchioles to reach the deep lung tissue.
2. **The Alveoli**: These are tiny, thin-walled, balloon-like air sacs at the end of the respiratory tree.
3. **Function**: The **alveoli** are the primary sites for the exchange of gases ($O_2$ and $CO_2$) between the inhaled air and the blood in the surrounding pulmonary capillaries.
4. **Mechanism**: Gaseous exchange occurs across the alveolar-capillary membrane purely by **diffusion**.

Rank Guru

Respiration

Select the correct option:

Solution

🔒 Solution Hidden from View

More respiration Practice Questions

Photorespiration predominantly occurs in which plant type under high oxygen?

Respiratory quotient (RQ) for complete oxidation of glucose is:

About This Question