Name the primary site of exchange of gases in our body?

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Solution

Primary site of exchange of gases :

Alveoli are the primary sites through which the exchange of gases takes place. They are thin and richly supplied with blood vessels. The close contact of the alveoli with the blood vessels makes an easier exchange of gases through it.

Final answer : Alveoli

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Exchange of gases in the body takes place by which of the following mechanisms?

Column - I	Column - II
(a)	Pneumotaxic centre	(i)	Alveoli
(b)	$O_{2}$ dissociation curve	(ii)	Pons region of brain
(c)	Carbonic anhydrase	(iii)	Haemoglobin
(d)	Primary site of exchange of gases	(iv)	R.B.C.

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