Question

Due to its system of nine air sacs connected to the lungs, the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.

Which type of bird is most likely to need air sacs to reduce its weight?
a. float on water but dont dive
b. ratites
c. birds that migrate long distances

Answer 1

Birds that migrate long distances are most likely to need air sacs to reduce their weight, as these sacs facilitate efficient respiration and lighten the body for endurance flying.

Step-by-step explanation:

The type of bird that is most likely to need air sacs to reduce its weight is c. birds that migrate long distances.

Air sacs serve several functions, including making the bird lighter compared to similar-sized animals without air sacs, and enabling efficient respiration, particularly at high altitudes where oxygen is scarce.

These traits are especially beneficial for migratory birds, which need to cover vast distances and may encounter varying altitudes during their journeys.