What are human hearts?

Answer 1

The heart has two main valves..the one on the right is called the tricuspid valve and the one on the left side of the heart is called the mitral valve. The valves are located between the atria and the ventricles. There are four chambers in the human heart...a right and a left atrium and a right and a left ventricle.

The heart is made of "filling stations" = the atria and "pumping stations" = the ventricles. The valves prevent blood from moving between the atria and ventricles during the pumping and filling processes. Once the atria are filled, the next beat of the heart moves the blood to the next chamber....either the right/left ventricle during systole (siss-toll-ee) or diastole (dye-ah-stoll-ee) The top number ( the "numerator") on your blood pressure reading is systolic pressure. The bottom number (the "denominator") is diastolic pressure, which indicates if you have hypertension.

Without the valves, the blood doesn't stay in the proper chamber during an action of the heart muscle.