Dho Health Science

The double-layered membrane that covers the outside of the heart is the endocardium.

• True

• False

The muscle layer of the heart is the ____________.

• endocardium

• ectocardium

• pericardium

• myocardium

The chamber of the heart that receives deoxygenated blood as it returns from body cells is the _________________.

• Right Atrium

• Right Ventricle

• Left Atrium

• Right Ventricle

Neutrophils, monocytes, thrombocytes, and lymphocytes are all different types of leukocytes.

• True

• False

The period of ventricular contraction in the heart is called diastole.

• True

• False

An embolus is a foreign substance circulating in the bloodstream.

• True

• False

The largest artery in the body is the _________.

• Carotid

• Femoral

• Aorta

• Coronary

The blood vessels that carry blood away from the heart are the __________.

• arteries

• veins

• venules

• capillaries

How much blood does the average adult have in his or her body?

• 2 to 4 quarts

• 4 to 6 quarts

• 6 to 8 quarts

• 3 to 4 quarts

Plasma is approximately 75% water with many suspended substances.

• True

• False