Question

The change of gases occurs in the
i. trachea ii. alveolus
iii. bronchus iv. nose

Answer 1

Answer:

the change of gases occurs in Alveolus

Explanation:

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Answer 2

Answer:

1 Does gas exchange occur in the trachea?

Although all parts of the tracheal system allow oxygen to diffuse out to the tissues and carbon dioxide to enter, most of the gas exchange occurs across the smaller tracheae and tracheoles because they are the parts of the system in intimate contact with cells.

2 During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs. This happens in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

3 The smallest bronchioles end in tiny air sacs. These are called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream.

4 Does gas exchange occur in the nose?

The lungs are the organs in which gas exchange takes place between blood and air. Air enters the respiratory system through the nose. As the air passes through the nasal cavity, mucus and hairs trap any particles in the air. The air is also warmed and moistened so it won't harm delicate tissues of the lungs