Assertion:Air sacs are connected to lungs in Class Aves.
Reason: Air sacs supplement respiration in birds.

Air sacs are associated with lungs in

Air sacs are found in:

Structures that supplement respiration in birds are

Structures that supplement respiration in birds are

Thin walled air sacs are connected with lungs in

Thin walled air sacs are connected with lungs in

Air sacs are found only inn

Air sacs are found only inn

Assertion :- Air sacs in Aves are connected to lungs and supplement in respiration. Reason :- It increases the area of gaseous exchange.