The lungs is frogs are
A. compact spongy masses
B. thin – walled elastic, hollow bags
C. thick – walled non – elastic, hollow bags
D. thick – walled non – elastic, solid mases
A. compact spongy masses
B. thin – walled elastic, hollow bags
C. thick – walled non – elastic, hollow bags
D. thick – walled non – elastic, solid mases
Correct Answer – B