The exchange of gasses in the alveoli of the lungs takes place during respiration. Identify the labeling a-e

Options

A. a- Air flows into and out of alveoli
b-Deoxygenated blood
c-oxygenated blood
d-oxygen diffuses into red blood cells
e-Carbon dioxide diffuses out of the plasma
B. a- Air flows out of alveoli
b- oxygenated blood
c-Deoxygenated blood
d-oxygen diffuses into red blood cells
e-Carbon dioxide diffuses out of the plasma
C. a- Air flows into and out of alveoli
b-Deoxygenated blood
c-oxygenated blood
d-Carbon dioxide diffuses out of the plasma
e-oxygen diffuses into red blood cells
D. a- Air flows out of alveoli
b- oxygenated blood
c-Deoxygenated blood
d- Carbon dioxide diffuses out of the plasma
e- oxygen diffuses into red blood cells

Answer

### Step-by-Step Solution:

1. **Understanding the Process of Gas Exchange**:
- The primary function of the alveoli in the lungs is to facilitate the exchange of gases (oxygen and carbon dioxide) between the air and the blood.

2. **Air Flow in the Alveoli**:
- Air enters the alveoli during inhalation, where oxygen is absorbed into the bloodstream, and carbon dioxide is released from the blood into the alveoli to be exhaled.

3. **Identification of Components**:
- Label A: Represents the air flowing into and out of the alveoli.
- Label B: Represents deoxygenated blood (rich in carbon dioxide) that comes to the alveoli.
- Label C: Represents oxygenated blood (rich in oxygen) that leaves the alveoli after gas exchange.
- Label D: Represents the diffusion of carbon dioxide out of the plasma into the alveoli.
- Label E: Represents the diffusion of oxygen into the red blood cells from the alveoli.

4. **Correct Identification**:
- A is correctly identified as the air flow in and out of the alveoli.
- B is identified as deoxygenated blood.
- C is identified as oxygenated blood.
- D is identified as the carbon dioxide diffusing out of the plasma.
- E is identified as the oxygen diffusing into the red blood cells.

5. **Conclusion**:
- The correct identification of labels A to E reflects the accurate process of gas exchange in the alveoli during respiration.