Answer:
diffusion in the air molecules
osmosis in water molecules
C planting trees. It adds oxygen
Nearly all of the energy comes from the sun
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:
