Circulatory system

How does blood get pumped through the heart?

• Deoxygenated blood from right ventricle pumped to the lungs.

• The sinoatrial nodes generate electrical impulse.

• Oxygenated blood from left ventricle pumped to the aorta

• Atrioventricular node is connected to bundle of His

The outermost layer of the heart epicardium is also known as _______

• myocardium

• pericardium

• visceral pericardium

• endocardium

______ prevents the bicuspid and tricuspid valve from turning inside out when the ventricles contracts.

• septum

• cardiac muscle

• endothelium

• chordae tendineae

The wall of the right ventricle is much thicker than that of the left ventricle.

• TRUE

• FALSE

_____ are large vessels which carry blood back to the heart.

The innermost layer of the arteries wall is consist of endothelial cells.

• TRUE

• FALSE

How much blood does a human body have?

• 45%

• 5-6 liters

• 55%

• 7-8 liters

_______ is a cells that guard and defend the body against the infection.

________ prevents the blood from flowing back into the ventricles

_______ are the site of exchange of materials between tissues and the blood.