Human Body Systems

Circulatory System MCQs with Answers

Welcome to the Circulatory System MCQs with Answers. In this post, we have shared Circulatory System Online Test for different competitive exams. Find practice Circulatory System Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Circulatory System.

The circulatory system, also known as the cardiovascular system, is a complex network responsible for the transportation of blood, nutrients, oxygen, carbon dioxide, hormones, and other essential substances throughout the body. It plays a crucial role in maintaining homeostasis and supporting the body’s metabolic processes. The circulatory system consists of the heart, blood vessels (arteries, veins, and capillaries), and blood.

The Heart: The heart is the central organ of the circulatory system, acting as a pump to circulate blood. It has four chambers: the right atrium, right ventricle, left atrium, and left ventricle. The right side of the heart pumps deoxygenated blood to the lungs for oxygenation (pulmonary circulation), while the left side pumps oxygenated blood to the rest of the body (systemic circulation).

Arteries: These blood vessels carry oxygenated blood away from the heart to the tissues and organs. The largest artery is the aorta, which branches into smaller arteries that reach various parts of the body. Arteries have thick, elastic walls to withstand the high pressure of blood being pumped from the heart.

Veins: Veins return deoxygenated blood from the body back to the heart. They have thinner walls compared to arteries and often contain valves to prevent the backflow of blood, ensuring it moves in the correct direction. The largest veins are the superior and inferior vena cava, which transport blood from the upper and lower parts of the body to the heart.

Capillaries: These are the smallest blood vessels, forming an extensive network that connects arteries and veins. Capillaries have thin walls that allow for the exchange of oxygen, nutrients, carbon dioxide, and waste products between the blood and surrounding tissues. This exchange occurs through diffusion.

Blood: Blood is a vital fluid composed of red blood cells, white blood cells, platelets, and plasma. Red blood cells transport oxygen and carbon dioxide, white blood cells are involved in immune responses, platelets help in blood clotting, and plasma serves as the medium for carrying nutrients, hormones, and waste products.

Circulatory System Online Quiz

By presenting 3 options to choose from, Circulatory System Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Circulatory System Questions and Answers and click over the correct answer.

  • Test Name: Circulatory System MCQ Quiz Practice
  • Type: Quiz Test
  • Total Questions: 40
  • Total Marks: 40
  • Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quiz, simply click on question and comment below that question, so that we can update the answer in the quiz section.

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Circulatory System MCQs

Circulatory System 

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1 / 40

Where is the heart located in the body?

2 / 40

What is the upper chamber of the heart called?

3 / 40

What is the primary function of the circulatory system?

4 / 40

What is the main component of blood responsible for carrying oxygen?

5 / 40

Which blood vessels carry blood away from the heart?

6 / 40

What is the main function of the systemic circulation?

7 / 40

What is the main function of red blood cells?

8 / 40

Which side of the heart pumps blood to the lungs?

9 / 40

Which component of blood is responsible for immune response?

10 / 40

What is the primary function of the lymphatic system in circulation?

11 / 40

Which blood vessels have valves to prevent backflow?

12 / 40

Which side of the heart contains oxygenated blood?

13 / 40

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

14 / 40

What is the primary function of white blood cells?

15 / 40

What is the largest artery in the human body?

16 / 40

What component of blood is responsible for clotting?

17 / 40

What is the largest artery in the human body?

18 / 40

What is the main function of white blood cells?

19 / 40

Which component of blood is responsible for clotting?

20 / 40

What is the function of the pulmonary veins?

21 / 40

What type of circulation supplies the heart muscle with blood?

22 / 40

Which type of blood vessel has the thinnest walls?

23 / 40

Which vessels are known as the resistance vessels?

24 / 40

What is the role of the vena cava?

25 / 40

Which heart valve prevents backflow into the left atrium?

26 / 40

Which vessels collect blood from the capillaries?

27 / 40

Which heart chamber receives deoxygenated blood from the body?

28 / 40

Which blood vessel carries oxygenated blood from the lungs to the heart?

29 / 40

What is the primary function of the hepatic portal vein?

30 / 40

Which heart chamber pumps oxygenated blood to the body?

31 / 40

What is the role of hemoglobin in red blood cells?

32 / 40

Which blood vessels return blood to the heart?

33 / 40

Which chamber of the heart pumps blood to the lungs?

34 / 40

What is the function of the left atrium?

35 / 40

Which artery supplies blood to the brain?

36 / 40

What is the term for the liquid component of blood?

37 / 40

Which blood vessel has the thinnest walls?

38 / 40

Which vessel carries oxygenated blood to the heart muscle itself?

39 / 40

Which blood vessels are involved in the exchange of gases and nutrients?

40 / 40

Which part of the circulatory system carries oxygen-poor blood from the heart to the lungs?

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Circulatory System Flashcards

What is the primary function of the circulatory system?

Transport nutrients and oxygen

Which blood vessels carry blood away from the heart?

Arteries

What is the main component of blood responsible for carrying oxygen?

Red blood cells

Which heart chamber pumps oxygenated blood to the body?

Left ventricle

Which blood vessels are involved in the exchange of gases and nutrients?

Capillaries

What is the largest artery in the human body?

Aorta

Which component of blood is responsible for clotting?

Platelets

What is the function of the pulmonary veins?

Carry oxygenated blood from the lungs

Which side of the heart contains oxygenated blood?

Left

Which blood vessels return blood to the heart?

Veins

What is the role of the vena cava?

Return blood to the right atrium

Which type of blood vessel has the thinnest walls?

Capillaries

What is the primary function of white blood cells?

Fight infections

Which heart chamber receives deoxygenated blood from the body?

Right atrium

Which part of the circulatory system carries oxygen-poor blood from the heart to the lungs?

Pulmonary arteries

Which blood vessels have valves to prevent backflow?

Veins

What is the term for the liquid component of blood?

Plasma

Which vessel carries oxygenated blood to the heart muscle itself?

Coronary artery

What is the role of hemoglobin in red blood cells?

Carry oxygen

Which heart valve prevents backflow into the left atrium?

Mitral valve

Which component of blood is responsible for immune response?

White blood cells

What is the primary function of the lymphatic system in circulation?

Return interstitial fluid to the blood

Which chamber of the heart pumps blood to the lungs?

Right ventricle

Which vessels collect blood from the capillaries?

Venules

What is the main function of the systemic circulation?

Supply oxygen and nutrients to the body

Which artery supplies blood to the brain?

Carotid artery

Which side of the heart pumps blood to the lungs?

Right

What is the function of the left atrium?

Receive oxygenated blood from the lungs

Which vessels are known as the resistance vessels?

Arterioles

What is the primary function of the hepatic portal vein?

Carry blood from the intestines to the liver

Which blood vessel carries oxygenated blood from the lungs to the heart?

Pulmonary vein

What is the largest artery in the human body?

Aorta

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

Artery

What is the main function of red blood cells?

Transport oxygen

Where is the heart located in the body?

Chest cavity

What is the upper chamber of the heart called?

Atrium

What type of circulation supplies the heart muscle with blood?

Coronary circulation

What component of blood is responsible for clotting?

Platelets

Which blood vessel has the thinnest walls?

Capillaries

What is the main function of white blood cells?

Fight infections

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