What breathes by relaxing the lungs?
mammals tortoises dogs chickens ducks humans crocodiles animals
A B C D E F G H
Belly breathing uses the diaphragm, which helps relax the lungs.
Mammals breathe by relaxing the lungs.
What breathes by relaxing the lungs? (A) mammals (B) tortoises (C) dogs (D) chickens (E) ducks (F) humans (G) crocodiles (H) animals