Write the feature that distinguish between the two : Sino-atrial node and Atrio-ventricular node
$SA$ node : It is a special type of muscular tissue formed in group of the wall of atrium. It initiates the heart beat.
$AV$ Node : Fibrous tissue located between right atrium and ventricle. Electric waves pass through it.
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
What is the function of valves in the heart?
In which chamber of heart, more blood is present?
Describe internal structure of heart in detail.