Marking brainlest !first to answer correctly will be marked brainlest

The cardiac cycle consists of two phases; a period where the heart muscle is relaxed, called diastole, and a period of contraction, called systole.

These are then divided into four stages. These are;

1. Ventricular Filling Period (VPF)

2. Isovolumetric Contraction Period (ICP)

3. Ventricular Ejection Period (VEP)

4. Isovolumetric Relaxation Period (IRP)

At rest, cardiac diastole lasts for approximately 0.5 seconds, and cardiac systole lasts approximately 0.3 seconds to complete. However, during exercise, when the heart rate is increased the time period of diastole , especially, is reduced.

Hope this helps!

this doesn't seem to be an actual health/school question. yet, im gonna answer it as if it is one. (by the way, im here for you if it isnt).

humans are very odd creatures. yet, this question is very biased against males. all genders do happen to cheat on their wives / husbands. the real question should be why genders cheat on the person they love. some people might make bad choices, or just make a mistake

explanation: