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
The heart continuous beating normally even when its nervous supply is completely obliterated because it is
Describe external structure of heart.
Definition / Explanation :
$(1)$ $AV$ valve (Tricuspid)
$(2)$ Mitral (Bicuspid) valves
Match the items given in Column $I$ with those in Column $II$ and select the correct option given below:
Column-$I$ |
Column-$II$ |
$(a)$ Tricuspid valve |
$(i)$ Between left atrium and left ventricle |
$(b)$ Bicuspid valve |
$(ii)$ Between right ventricle and pulmonary artery |
$(c)$ Semilunar valve |
$(iii)$ Between right atrium and right ventricle |
The coronary sinus in the heart is situated along its