- What is the major circulation of blood in the body called?
Systemic circulation
Name the closed circulatory system that carries tissue fluids in the body.
Lymphatic system
- What is the phase of ventricular relaxation called?
Ventricular diastole
- Name the pacemaker of a normal heart.
Sino-atrial node (SA node)
- Which property of SA node is responsible for its spontaneous depolarization?
Pacemaker potential
- Why is SA node considered as the cardiac pacemaker although other conducting tissues also have the same ability?
SA node has the highest rate of discharge
- Where is the SA node located in the heart?
Junction of superior vena cava with the right atrium
SA node and AV node are connected by three types of bundle of atrial fibres. What is the type of these fibres?
Purkinje type of fibres
- Where does the internodal tract of Thorel present?
Between the SA and AV nodes
- What is the only tissue through which impulses pass from atria to ventricles?
AV node
(Physiology; UMS 2008)
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