Females who lift weights are not going to develop large, bulky muscles because
a. they have more muscle fibers than men
b. they have thicker muscle fibers than men
c. they have lower testosterone levels than men
d. all of the above

the last statement is correct i.e.

when your heart is not pumping enough blood around your body because your heart is severely failing, you may need an artificial heart. an artificial heart is a mechanical device, about the size of an orange, that is connected to your heart or implanted in your chest to or replace a failing heart.