THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Alveoli: The alveoli are the specialized air-sacs (outpouching) of 200 µm diameter. These are the structural and functional unit of the respiratory system. These are the primary site of exchange of oxygen and carbon dioxide.

Detailed explanation-2: -Each alveolus is cup-shaped with very thin walls. It’s surrounded by networks of blood vessels called capillaries that also have thin walls. The oxygen you breathe in diffuses through the alveoli and the capillaries into the blood.

Detailed explanation-3: -Description. Pulmonary alveolus ( plural: alveoli) are tiny air sacs that function as basic respiratory units. It is a hollow cup-shaped cavity in the lung parenchyma, where gas exchange takes place.

Detailed explanation-4: -The bronchi divide into smaller bronchioles which branch in the lungs forming passageways for air. The terminal parts of the bronchi are the alveoli. The alveoli are the functional units of the lungs and they form the site of gaseous exchange.