In which chamber of heart, more blood is present?
Right atria
Right ventricle
Left ventricle
All have same quantity of blood
Valves are necessary in veins but not in arteries because
Mixing up of arterial and venous blood does not take place in a heart having
Purkinje fibres are present in
Describe internal structure of heart in detail.
Write the feature that distinguish between the two : Sino-atrial node and Atrio-ventricular node