Question

what increase the surface area in the lungs​

Answer 1

alveoli increase the surface area in lungs

Answer 2

Short Answer:-

Alveoli

Answer:-

Large surface area - many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.

Explanation:

The Importance of Surface Area

Alveoli of Lungs:

• Alveoli are the air sacs located at the ends of the bronchioles inside the lungs (the path of inhaled

air is trachea→bronchi→bronchioles→alveoli). The cells of the alveoli are the moist respiratory

surfaces where O2 diffuses into the blood and CO2 diffuses out of the blood. Each lung contains

millions of these sacs.

• The small round alveoli allow for an amazingly large surface area for this gas exchange to take

place. Remember, the blood capillaries must be in contact with the respiratory surface for gas

exchange to take place. Therefore, the greater the surface area, the more gas exchange can

occur.

• Fun Fact: The total respiratory surface of human lungs is about 100 m2

, equal to the surface area

of a racquetball court!

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