{[['
']]}
']]}
That’s surprising, because the unidirectional airflow of birds was thought to have evolved due to the high-oxygen demands of flight: Instead of being partially filled with stale, depleted air like human lungs, avian lungs contain air with a much higher average oxygen content and are much more efficient at getting oxygen to the blood.
So this method of breathing was generally considered to be unique to both warm-blooded animals and birds.
Source: Here
Source: Here
Post a Comment