Identify the process which is not involved in respiration.

Options

A. Gaseous transport
B. Tissue respiration
C. Cellular respiration
D. Circulation

Explanation

To identify the process that is not involved in respiration, we need to analyze each option provided:

1. **Gaseous Transport**: This process involves the movement of gases (like oxygen and carbon dioxide) between the lungs and the tissues. Since it is essential for delivering oxygen to cells and removing carbon dioxide, it is indeed involved in respiration.

2. **Tissue Respiration**: This refers to the exchange of gases at the tissue level, where oxygen is used by cells for metabolic processes and carbon dioxide is produced as a waste product. This process is also a crucial part of respiration.

3. **Cellular Respiration**: This is the metabolic process by which cells convert glucose and oxygen into energy (ATP), producing carbon dioxide and water as byproducts. Cellular respiration is a fundamental aspect of respiration.

4. **Circulation**: This process involves the movement of blood throughout the body, transporting nutrients, gases, and waste products. While circulation supports respiration by delivering oxygen and removing carbon dioxide, it is not a direct part of the respiratory process itself.

Based on the analysis, the process that is **not involved in respiration** is **Circulation**.

**Final Answer**: Circulation

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