Question

How does a crane breathe

Answer 1

Birds do not have a diaphragm so air is moved in and out of the respiratory system through pressure changes in the air sacs. Muscles in the chest cause the sternum to be pushed outward. This creates a negative pressure in the air sacs, causing air to enter the respiratory system. For expiration certain muscles contract to increase the pressure on the air sacs and push the air out.

Respiration in birds requires two respiratory cycles (inspiration, expiration, inspiration, expiration) to move the air through the entire respiratory system.

Answer 2

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The human body is in constant change the minute we're born. It's in a constant state of decay. We're all like Ford Escorts, just falling apart.