Circulatory System Quiz

What is the main function of the heart in the circulatory system?

• To digest food

• To regulate body temperature

• To heat the body

• To pump blood throughout the body

Answer explanation

The main function of the heart in the circulatory system is to pump blood throughout the body.

Which chamber of the heart receives oxygenated blood from the lungs?

• left atrium

• right atrium

• upper atrium

• lower ventricle

Answer explanation

The correct chamber of the heart that receives oxygenated blood from the lungs is the left atrium.

What is the name of the valve that separates the left atrium from the left ventricle?

• Tricuspid valve

• Pulmonary valve

• Aortic valve

• Mitral valve

Answer explanation

The name of the valve that separates the left atrium from the left ventricle is the Mitral valve.

What type of blood vessel carries blood away from the heart?

• Arteries

• Veins

• Capillaries

• Lymphatic vessels

Answer explanation

Arteries are the type of blood vessel that carries blood away from the heart.

What is the smallest type of blood vessel in the body?

• Capillary

• Venule

• Arteriole

• Veinlet

Answer explanation

The smallest type of blood vessel in the body is a capillary, which allows for the exchange of nutrients and waste between blood and tissues.

Which blood vessel has the thickest walls to withstand high blood pressure?

• coronary artery

• capillary

• aorta

• vein

Answer explanation

The aorta has the thickest walls among the blood vessels to withstand high blood pressure, making it the correct choice.

What is the function of capillaries in the circulatory system?

• Capillaries regulate body temperature

• Capillaries store excess nutrients

• Capillaries function in the exchange of substances between the blood and tissues.

• Capillaries transport oxygen to the lungs

Answer explanation

Capillaries function in the exchange of substances between the blood and tissues.

What is the average heart rate of a healthy adult at rest?

• 60-100 beats per minute

• 40-80 beats per minute

• 70-110 beats per minute

• 50-90 beats per minute

Answer explanation

The average heart rate of a healthy adult at rest is typically between 60-100 beats per minute, making the answer choice '60-100 beats per minute' the correct option.

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

• aorta

• capillary

• vein

• coronary artery

Answer explanation

The name of the largest artery in the body is the aorta, making it the correct choice among the options provided.

What is the purpose of valves in veins?

• To prevent backflow of blood and maintain unidirectional flow towards the heart.

• To aid in digestion

• To produce hormones

• To regulate body temperature

Answer explanation

To prevent backflow of blood and maintain unidirectional flow towards the heart.