Question

How are lungs designed in human beings for exchange of gases 0?

Answer 1

Hi

Here devil1407

# The exchange of gases takes place between the blood capillaries that surround the alveoli and the gases present in the alveoli.

# Thus, alveoli are the sites for exchange of gases.

# The lungs get filled up with air during the process of inhalation as ribs are lifted up and diaphragm is flattened.

# The air that is rushed inside the lungs fills the numerous alveoli present in the lungs.

# Each lungs contain 300 - 350 million alveoli.

# These numerous alveoli increase the surface area for gaseous exchange making the process of respiration more efficient.

Hope it helps U

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Answer 2

♤ In the lungs, the air passage that divides into smaller and smaller tubes called bronchi which form bronchioles .

♤ The bronchioles terminate in the balloon like structure called alveoli.

♤ The alveoli present in the lungs provide maximum surface for exchange of gases.

♤ The alveoli have very thin walls and contain an extensive network of blood vessels to facilitate exchange of gases.