Circulatory System Quiz

What is the main organ of the circulatory system?

• liver

• stomach

• heart

• lung

What is the function of red blood cells?

• Regulating body temperature

• Producing bile

• Storing nutrients

• Transporting oxygen and carbon dioxide

What is the name of the largest artery in the human body?

• aorto

• aortae

• arteria

• aorta

What is the liquid part of blood called?

• plasma

• platelets

• serum

• hemoglobin

What is the role of platelets in the circulatory system?

• Platelets produce insulin

• Platelets transport oxygen in the blood

• Platelets help in blood clotting to prevent excessive bleeding.

• Platelets regulate blood pressure

What is the average heart rate of an adult at rest?

• 60-100 beats per minute

• 40-80 beats per minute

• 50-90 beats per minute

• 70-110 beats per minute

What is the purpose of valves in the heart?

• To produce hormones

• To regulate body temperature

• To aid in digestion

• To ensure blood flows in one direction and prevent backflow.

What is the difference between veins and arteries?

• Veins carry blood towards the heart and have valves to prevent backflow, while arteries carry blood away from the heart and have thicker walls to withstand high pressure.

• Veins carry oxygenated blood, while arteries carry deoxygenated blood

• Veins carry blood away from the heart and have valves to prevent backflow, while arteries carry blood towards the heart and have thinner walls

• Veins have thicker walls than arteries to withstand high pressure

What is the name of the process where blood is pumped out of the heart?

• Dispersion

• Ejection

• Pumping

• Extraction

How many chambers are there in the human heart?

• 4

• 8

• 6

• 2