Biology · General Awareness

Human Circulatory System

818 Questions

The human circulatory system explores the network of blood vessels, heart valves, and structural pathways. Test items often target blood flow sequences and specific vascular functions. Mastering these details is vital for biology preparation.

Heart valves and chambersBlood vessels and venulesArteries of the bodyBlood supply to organsCentral nervous system supply

Human Circulatory System Questions

Multiple choice

Why is blood called a connective tissue?

a. It carries food and oxygen to all the cells. b. It connects bones and muscles. c. It collects waste from all the parts of the body to liver and kidney. d. It connects bones to bones.

  1. Only a and b

  2. Only c and b

  3. Only a and c

  4. Only b and d

  5. None of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct. Both 'a' and 'c' are true. Blood carries food and oxygen to all the cells. It also collects waste from all the parts of the body and carries it to liver and kidney.

Multiple choice

'Microcirculation' is the flow of blood through the smallest vessels of the body. Which among the following characterises microcirculation?

  1. The exchange of solutes among the capillaries and body tissues occurs mainly through mass flow.

  2. The capillaries act as vital source of vascular resistance.

  3. All of the fluid circulating through the capillaries to the tissues is returned to the blood through the lymphatic circulation.

  4. The plasma proteins play key role in tissue fluid exchange mechanism.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This statement is correct. Plasma is the pale yellow coloured liquid part of blood and carries dissolved substances such as glucose and other products of digestion, hormones, vitamins, etc. Thus, it plays key role in tissue fluid exchange mechanism.

Multiple choice

The only artery which carries deoxygenated blood is _________.

  1. pulmonary artery

  2. renal artery

  3. hepatic artery

  4. coronary artery
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Deoxygenated (without oxygen) blood flows from the right atrium to the right ventricle and then, right ventricle pumps blood into the pulmonary artery. The pulmonary artery carries deoxygenated blood to the lungs, where it is supplied with fresh oxygen and carbon dioxide is removed.

Multiple choice

The pulmonary trunk originates from ___________.

  1. right auricle

  2. left auricle

  3. right ventricle

  4. left venrticle

  5. the lungs
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pulmonary trunk is a major vessel of the human heart which originates at the right ventricle. It branches into the right and left pulmonary arteries, which carries deoxygenated blood to the lungs.

Multiple choice

Which of the following statements is/are correct?

a. The left side of the heart pumps blood only into the lungs. b. The two sides of the heart are separated completely by a partition. c. Arteries carry blood from heart to body organs.

  1. Only a

  2. Only b

  3. Only c

  4. Both b and c

  5. Both a and b
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer as both statements b and c are correct.  This option is incorrect as statement a is incorrect. The left ventricle of the heart pumps blood to the entire body.

Multiple choice

Match the following:

a. Arteries 1. They are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells.
b. Capillaries 2. They are the thick-walled blood vessels which carry blood from the heart to all parts of the body.
c. Veins 3. They are the thin-walled blood vessels which carry blood from all parts of the body back to the heart.

  1. a - 2, b - 3, c - 1

  2. a - 1, b - 2, c - 3

  3. a - 1, b - 3, c - 2

  4. a - 2, b - 1, c - 3

  5. a - 3, b - 1, c - 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option. Arteries are the thick-walled blood vessels which carry blood from the heart to all parts of the body. Capillaries are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells. Veins are the thin-walled blood vessels which carry blood from all parts of the body back to the heart. This is a wrong option. Arteries are the thick-walled blood vessels which carry blood from the heart to all parts of the body. Capillaries are thin-walled and extremely narrow tubes or blood vessels which help in exchanging various materials between the blood and the body cells. Veins are the thin-walled blood vessels which carry blood from all parts of the body back to the heart.