The Eustachian tube is the
structure that allows upper respiratory infections to spread. The eustachian tube is a canal
that links the middle ear to the nasopharynx, which is composed of the upper
throat and the back of the nasal cavity. It also controls the pressure inside
the middle ear, making it equal with the air pressure outside the body.
Attached is the mentioned above table. I found the exercise on the internet.
The correct answer is:
"<span>the information shown is accurate."
When birds breath in, their posterior air sacs inflate with air from the outside, and their anterior air sacs inflate with air from the lungs. When they breath out the air that was then in the posterior air sacs is now pushed to the lungs, and the air that was in the anterior air sacs is expelled through the trachea.</span>