Question

The boy is very idle. He cannot prosper in life​

Answer 1

Answer:

Inside the lungs, the oxygen is exchanged for carbon dioxide waste through millions of microscopic sacs called alveoli. The inhaled oxygen diffuses into the pulmonary capillaries, binds to haemoglobin and is pumped through the bloodstream. The carbon dioxide from the blood diffuses into the alveoli and is expelled through exhalation.

Lungs are divided into a smaller structure called bronchi which are divided into bronchioles.

Alveoli are small, round or balloon-like structure found at the end of the bronchioles and provide a larger surface area and maximizes the exchange of gases inside the lungs.

The pulmonary alveolus is a sac roughly 0.2 to 0.5 mm in diameter.

These alveoli are found at the ends of air passageways in the lungs.

Sometimes, people associate alveoli structures with the appearance of a raspberry or a “bunch of grapes.”

In the average adult lung, there is an average of 480 million alveoli.