Name the following :
A respiratory substance

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Respiratory Substances**: Respiratory substances are compounds that undergo oxidation during the process of respiration to release energy. This energy is essential for various metabolic activities in cells.

2. **Identifying Common Respiratory Substances**: There are several types of respiratory substances, including carbohydrates, proteins, lipids, and organic acids. Among these, carbohydrates are the most commonly used.

3. **Focusing on Glucose**: The primary respiratory substance is glucose, which is the simplest form of carbohydrate. It plays a crucial role in both aerobic and anaerobic respiration.

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