Heart is protected by a double walled membranous bag called
All veins carry deoxygenated blood except
Which of the following is known as Natural Pacemaker of the heart?
The opening between the right atrium and right ventricle is guraded by a valve called
Oxygenated blood is carried by
When the heart is not pumping blood effectively enough to meet the needs of the body, it is called
A symptom of acute chest pain when enough oxygen is not reaching the heart muscle is called
Difference between systolic and diastolic pressure is
Normal blood pressure of a healthy individual is