Aerating pores in the bark of plants are known as Lenticels.

Lenticels are small openings or pores found on the stems, branches, and sometimes on the fruits of woody plants. They are responsible for the exchange of gases between the internal tissues of the plant and the external environment. Lenticels allow the plant to take in oxygen and release carbon dioxide, thus facilitating respiration in the bark.

Here is a detailed explanation of lenticels:

1. What are lenticels?
- Lenticels are specialized pores or openings found on the surface of the bark of woody plants.
- They are usually oval or elongated in shape and appear as small raised areas on the bark.
- Lenticels can vary in size and color depending on the plant species.

2. Function of lenticels:
- Lenticels play a crucial role in the exchange of gases, particularly oxygen and carbon dioxide, between the plant's internal tissues and the external environment.
- They allow oxygen to enter the inner bark layers, where it is utilized for cellular respiration.
- Carbon dioxide produced during respiration is released through the lenticels into the atmosphere.
- Lenticels also help in the elimination of excess water vapor from the plant's tissues.

3. Structure of lenticels:
- Lenticels consist of loosely arranged cells with air spaces in between.
- These air spaces allow the diffusion of gases.
- The outer layers of the lenticel are formed by cork cells, while the inner layers contain living cells.

4. Importance of lenticels:
- Lenticels are vital for the survival and growth of woody plants.
- In the absence of lenticels, the bark would become impermeable to gases, leading to the death of underlying tissues.
- They ensure proper gas exchange, maintaining the balance of oxygen and carbon dioxide in the plant's tissues.
- Lenticels also serve as a pathway for the release of excess water vapor, preventing waterlogging and potential damage to the bark.

In conclusion, lenticels are the aerating pores found on the bark of woody plants. They enable the exchange of gases, such as oxygen and carbon dioxide, between the internal tissues of the plant and the external environment. Lenticels are essential for plant respiration and the overall health of woody plants.