Plants, Animals, Protists, fungi, archaebacteria, eubacteria
Answer:
Basically, the Atrioventricular valves are Mitral and Tricuspid valves located between the atrium and ventricles. Their main functions is to “prevent the backflow of blood from the ventricles into the atrium during the ventricular contraction (systole).
Explanation:
Answer:
its answer is B hope ur help and mark me as brainlist
Conserve hot water.. check on the heating system and the water heater..
