The pericardium and the pericardial fluid help in
Protecting the heart from friction, shocks and keeps it moist
Pumping the blood
Receiving the blood from various parts of the body
None of the above
Write the feature that distinguish between the two : Sino-atrial node and Atrio-ventricular node
The heart of a healthy man beats normally per minute
In the heart of mammal the bicuspid valve is situated between
Draw a labelled diagram showing internal structure of heart.
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 |