The tissue respiration refers to

Options

A. inspiration
B. external respiration
C. internal respiration
D. expiration

Answer

**Step-by-Step Solution:**

1. **Understanding Respiration**: Begin by defining respiration. Respiration is a physiochemical process that involves both physical and chemical components.

2. **Physical Process of Respiration**: The physical aspect of respiration involves the exchange of gases. This is crucial for the overall process of respiration.

3. **Chemical Process of Respiration**: The chemical aspect involves the breakdown of food after digestion. The nutrients from the food are transported to the cells where they are converted into energy, primarily in the form of ATP (adenosine triphosphate).

4. **Types of Respiration**: There are two main types of respiration:
- **External Respiration**: This refers to the breathing process, where gas exchange occurs in the lungs. Oxygen is inhaled and carbon dioxide is exhaled, and this exchange happens directly with the environment.
- **Internal Respiration**: This occurs at the tissue level. It involves the exchange of gases between the blood and the tissues. Oxygen from the blood enters the cells, while carbon dioxide produced by the cells enters the blood.

5. **Conclusion**: The term "tissue respiration" specifically refers to internal respiration, where the exchange of gases occurs between the blood and the tissues.

**Final Answer**: The tissue respiration refers to internal respiration.

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