Question

Cluster of air sacs in lungs are called
a) alveoli
b) bronchi
c) bronchioles
d) air spaces

Answer 1

the answer is alveoli,..............................

Answer 2

Answer: The bronchi split into bronchioles, which are smaller airways, and alveoli, which are clusters of tiny air sacs.

Explanation:

• There are around 300 million air sacs in healthy lungs. A network of tiny blood arteries surrounds each air sac or capillaries. The oxygen in the air that is inhaled travels through the air sacs' along flimsy lining and into the blood vessels.
• Alveolar sacs, which resemble clusters of grapes, are formed by the alveoli. The alveolar ducts that lead to the alveolar sacs can be compared to the stems of individual grapes using the same analogy, however unlike grapes, alveolar sacs are pocket-like structures made up of several individual alveoli.
• Air sac, any of the air-filled add-ons to many animals' respiratory mechanisms. Air sacs can be found as little sacs off of the larger breathing tubes (tracheae) of insects, as lungs in birds, and as end organs in other organisms.

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