Tracheal respiration takes air to

Options

A. Blood
B. Tissues
C. Lungs
D. Body cavity.

Answer

**Step-by-Step Solution:**

1. **Understanding Tracheal Respiration**: Tracheal respiration is a method of gas exchange used primarily by insects and some other invertebrates. It involves a system of air-filled tubes known as tracheae.

2. **Function of Tracheae**: The tracheae are responsible for transporting air directly to the tissues of the organism. They are connected to the outside environment through small openings called spiracles.

3. **Gas Exchange Process**: In tracheal respiration, oxygen from the air enters the tracheae through the spiracles and is delivered directly to the tissues where it is needed. At the same time, carbon dioxide produced by the tissues is transported back through the tracheae to be expelled into the environment.

4. **Analyzing the Options**:
- **Blood**: Insects do not rely on blood for oxygen transport; they use the tracheal system instead.
- **Lungs**: Insects do not have lungs; they utilize the tracheal system for respiration.
- **Body Cavity**: While some gas exchange may occur in the body cavity, the primary function of tracheal respiration is to deliver air directly to the tissues.

5. **Conclusion**: Based on the function of tracheal respiration, the correct answer is that it takes air to the **tissues**.

**Final Answer**: Tracheal respiration takes air to the **tissues**.

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