Respiratory System Quiz

The respiratory surfaces in land animals are called linings of the lungs.

The microscopic air sacs in mammals and reptiles where gas exchange in the lungs occurs are called alveoli.

The microscopic air sacs in birds where gas exchange occurs are known as atria.

The largest airway that communicates with the external environment is the trachea.

The tubes that branch from the trachea and enter the lungs are the main bronchi.

The respiratory system is responsible for the exchange of oxygen and carbon dioxide in animals and plants, allowing for the uptake of oxygen and the release of carbon dioxide during cellular respiration and photosynthesis, respectively.

In land animals, the respiratory surface is internalized as linings of the lungs. In mammals and reptiles, gas exchange occurs in alveoli, while in birds, it occurs in atria.

The microscopic air sacs in the lungs, such as alveoli in mammals and reptiles, and atria in birds, have a rich blood supply, allowing for the close contact of air with the blood.

The system of airways includes hollow tubes, with the largest being the trachea, which branches into the two main bronchi. These bronchi then enter the lungs and further branch into narrower secondary and tertiary bronchi.

The size of the organism, the environment in which it lives, and its evolutionary history greatly influence the variations in the anatomy and physiology of the respiratory system in different organisms.