According to the uses of both horse and donkey, there are some similarities as well as dissimilarities. Both of them were wild once and then some became domesticated. Presently, most of the donkeys and horses are domesticated while still there are some wild populations.
In the breathing system, the air enters at the nostrils (nares) , passes through the nasal cavity (where some smell detectors are located) , and enters the trachea. Sid â¦ e branches of this system the Eustachian tubes communicate with the middle ear to allow for the balancing or air pressure across the eardrum.
Air enters our lungs ( oxygen, nitrogen, but also carbon dioxide, water , and numerous solid and liquid particles). But the lungs only absorb oxygen, and partially : the exhaled air is poorer in oxygen (less than 21%). The number of nitrogen molecules entering and exiting your lungs is the same.