The tiny,thin-walled sacs in the lungs are called
A) bronchi
B) villi
C) pharynx
D) alveoli

Question

Quizplus · Accepted Answer

The tiny, thin-walled sacs in the lungs are called alveoli. These structures are responsible for gas exchange in the respiratory system, allowing oxygen to enter the bloodstream and carbon dioxide to be removed. Bronchi are the large air passages that lead to the lungs, while villi are finger-like projections in the small intestine that help with nutrient absorption. The pharynx is a shared pathway for air and food, located at the back of the throat.

The Tiny,thin-Walled Sacs in the Lungs Are Called