Question

iii.
auring
acavity.
The ventrienlar walls are much thicker than the auricular walls.
Millions of alveoli are richly supplied with blood capillaries.
Herbivores have longer length of small intestine than carnivores.
iv.​

Answer 1

answer :

Because ventricles have to do more work as compare to atria. Ventricles pump blood into various organs and the pressure of blood flowing in them is more than that of articles