Valves are necessary in veins but not in arteries because
Blood flows with greater force in veins
Blood in veins flows without jerk
Blood from heart may not be pushed back into veins
Pressure in veins is low, which can flow the blood
What is the function of valves in the heart?
The heart of a healthy man beats normally per minute
The pericardium and the pericardial fluid help in
Definition / Explanation :
$(1)$ $AV$ valve (Tricuspid)
$(2)$ Mitral (Bicuspid) valves
The opening of auricles and ventricles on the right side is guarded by