When you compress the heart in this demonstration, why does the water squirt out of the artery? A. It's just like squeezing a sponge
B. The arterial valve sucks the water out of the ventricle
C. The atrio-ventricular valve has parachute-like flaps to stop the water coming out the top
D. The atrioventricular valve works like a rigid door to stop the water coming out the top