Identify correct sequence.

Options

A. Breathing Pulmonary gas exchange `to` Transport of gases systemic gas exchange `to` cellular respiration
B. Breathing `to` systemic gas exchange `to` Transport of gases pulmonary gas exchange `to` cellular respiration
C. Cellular respiration `to` pulmonary gas exchange `to` transport of systemic gas exchange `to` breathing
D. Cellular respiration `to` breathing `to` pulmonary gas exchange - transport of gases `to` systemic gas exchange

Answer

To identify the correct sequence of the respiratory process, we can break down the steps involved in breathing and gas exchange. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Inhalation**: The process begins with inhalation, where air enters the body through the nose or mouth. This is the first step in the respiratory process.

2. **Pharynx**: After inhalation, the air travels down the pharynx. The pharynx serves as a passageway for air to move from the nasal cavity or mouth to the trachea.

3. **Trachea**: The air then moves into the trachea (windpipe), which is a tube that directs air into the lungs. The trachea divides into two bronchial tubes.

4. **Bronchial Tubes**: The trachea splits into the right and left bronchial tubes, leading to the right and left lungs, respectively.

5. **Lungs and Alveoli**: Inside the lungs, the bronchial tubes further divide into smaller bronchioles, which end in tiny air sacs called alveoli. The alveoli are where gas exchange occurs; they absorb oxygen from the air.

6. **Oxygen Transport**: Once oxygen is absorbed by the alveoli, it enters the bloodstream. The oxygen-rich blood is then transported to the heart.

7. **Circulation**: The heart pumps the oxygenated blood throughout the body, delivering oxygen to the cells and tissues.

8. **Cellular Respiration**: The cells utilize the oxygen for metabolic activities, which is known as cellular respiration. This process produces carbon dioxide as a byproduct.

9. **Carbon Dioxide Transport**: The carbon dioxide produced by the cells is carried back to the lungs via the bloodstream.

10. **Exhalation**: Finally, the carbon dioxide is expelled from the body when we exhale, completing the respiratory cycle.

### Correct Sequence:
The correct sequence of the respiratory process is:
1. Inhalation
2. Pharynx
3. Trachea
4. Bronchial Tubes
5. Lungs and Alveoli
6. Oxygen Transport
7. Circulation
8. Cellular Respiration
9. Carbon Dioxide Transport
10. Exhalation