How birds breathe

Birds have a special way of breathing. They have a set of efficient lungs and air bag systems that allow them to breathe more efficiently in flight and high altitude environments. Here is how birds breathe:

1. Air bags: Birds have 9 pairs of air bags, which are connected to each other, connected to the lungs, and distributed in their chest, abdomen and neck. The main function of the air bags is to improve the breathing efficiency of birds and increase the storage of oxygen.

2. Unidirectional airflow: Birds' airflow flows in one direction, that is, oxygen enters the lungs through only one direction when it enters the lungs, instead of going back and forth through the same path. This unidirectional airflow can ensure that more oxygen reaches the muscles and other organs that need oxygen to support flight and high-intensity exercise.

3. Efficient lungs: Birds' lungs are smaller and more compact than those of mammals, but very efficient. Due to the unidirectional flow of air, new oxygen is brought into the lungs and transferred to the body through the blood, while old carbon dioxide is expelled from the body faster.

In short, the breathing method of birds is the result of adaptive evolution, which enables them to breathe more effectively, move and fly efficiently in different environments.

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