Starting from the nostrils, trace the path in sequence which the inspired air takes until it reaches the air sacs.

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Solution

Pathway of air:
nasal cavities (or oral cavity) $\to$ pharynx $\to$ trachea $\to$ primary bronchi (right & left) $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ bronchioles $\to$ alveoli (site of gas exchange).

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The correct sequence of air passage during inhalation?

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

Which of the following is the correct sequence of air passage during inhalation ?
(a) nostrils $\to$ larynx $\to$ pharynx $\to$ trachea $\to$ lungs
(b) nasal passage $\to$ trachea pharynx $\to$ lirynx $\to$ alveoli
(c) larynx $\to$ nostrils $\to$ pharynx $\to$ lungs
(d) nostrils $\to$ pharynx $\to$ larynx $\to$ trachea $\to$ alevoli

Q. The act of taking in air into the body through nostrils is called ______.

Q. Starting from the pioneer species, trace the sequence that follows in an ecological succession on a bare rock, until climax community is reached in an ecosystem. Name this type of succession. [3 marks]

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

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Starting from the nostrils, trace the path in sequence which the inspired air takes until it reaches the air sacs.

Pathway of air: nasal cavities (or oral cavity) → pharynx → trachea → primary bronchi (right & left) → secondary bronchi → tertiary bronchi → bronchioles → alveoli (site of gas exchange).

Pathway of air:
nasal cavities (or oral cavity) $\to$ pharynx $\to$ trachea $\to$ primary bronchi (right & left) $\to$ secondary bronchi $\to$ tertiary bronchi $\to$ bronchioles $\to$ alveoli (site of gas exchange).