Arrange the following in the order of movement of air from outside the body to alveoli inside the body.
Larynx, alveoli, trachea, pharynx, external nostrils, internal nostrils, nasal cavities.

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Solution

The correct order of flow of air would be: external nostrils, internal nostrils, nasal cavities, pharynx, larynx, trachea, alveoli.

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Question 15
Which is the correct sequence of air passage during inhalation?

(a) $N o s t r i l s \to l a r y n x \to p h a r y n x \to t r a c h e a \to l u n g s$
(b) $N a s a l p a s s a g e \to t r a c h e a \to p h a r y n x \to l a r y n x \to a l v e o l i$
(c) $L a r y n x \to n o s t r i l s \to p h a r y n x \to l u n g s$
(d) $N o s t r i l s \to p h a r y n x \to l a r y n x \to t r a c h e a \to a l v e o l i$

Question 15
Which is the correct sequence of air passage during inhalation?

(a) $N o s t r i l s \to l a r y n x \to p h a r y n x \to t r a c h e a \to l u n g s$
(b) $N a s a l p a s s a g e \to t r a c h e a \to p h a r y n x \to l a r y n x \to a l v e o l i$
(c) $L a r y n x \to n o s t r i l s \to p h a r y n x \to l u n g s$
(d) $N o s t r i l s \to p h a r y n x \to l a r y n x \to t r a c h e a \to a l v e o l i$

The correct sequence of air passage during inhalation?

$N o s t r i l s \to p h a r y n x \to l a r y n x \to t r a c h e a \to a l v e o l i$

Q. Arrange the following parts of the human respiratory tract in the same order in which air flows during expiration:
Nasal chamber, pharynx, larynx, internal nares, trachea, lungs

Air enters in the lungs in a tiny cavity called alveoli. Oxygen diffuses into our blood from alveoli. The average radius of alveoli is

0.005 c m

and air inside it contains

21

O_{2}

and

79

N_{2}

. Assuming that the pressure in the alveoli is

1 a t m

at body temperature of

37^{\circ} C

Number of

O_{2}

molecules in one alveoli is :

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Arrange the following in the order of movement of air from outside the body to alveoli inside the body. Larynx, alveoli, trachea, pharynx, external nostrils, internal nostrils, nasal cavities.

The correct order of flow of air would be: external nostrils, internal nostrils, nasal cavities, pharynx, larynx, trachea, alveoli.

Arrange the following in the order of movement of air from outside the body to alveoli inside the body.
Larynx, alveoli, trachea, pharynx, external nostrils, internal nostrils, nasal cavities.