The shapes and the thickness of the walls of the right ventricle compared to the left are

they are different.
The left ventricule is round in cross section (egg shaped)  the walls are thicker
because it exerts more pressure than the right one. It is delivering blood to most part of the body needing oxygenated blood to make them function. The right one only delivers deoxygenated blood.
That's part of the explanation

hope I helped !

The human reproductive system uterusthe bird reproductive system eggs dropped

The answer to your question is  it relieves stress and boredom.  the rest of the answer choices would be long term.