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

Middle meningeal artery is a branch of

  1. external carotid artery

  2. internal maxillary artery

  3. superficial temporal artery

  4. middle cerebral artery
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Middle meningeal artery

  1. Branch of 1st part of maxillary artery
  2. Lies lateral to sphenomandibular ligament and medical to lateral pterygoid in the infratemporal fossa
  3. Passes between two roots of auriculotemporal nerve near its origin
Multiple choice

Common carotid artery bifurcates at

  1. upper border of thyroid cartilage

  2. upper border of cricoid cartilage

  3. the hyoid bone

  4. the sternum angle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Following a similar course on both sides, the common carotid artery ascends, diverging laterally from behind the sternoclavicular joint to the level of the upper border of the thyroid cartilage of the larynx (C3-C4 junction), where it divides into external and internal carotid arteries. This bifurcation can sometimes be at a higher level.

Multiple choice

Which of the following is not the property of Arteries?

  1. They are the distributing vessels of the body.

  2. Coronary artery supplies blood to the brain.

  3. They have thick and elastic walls.

  4. They have a narrow lumen.

  5. Pulmonary artery carries de-oxygenated blood.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This statement is wrong. Coronary artery supplies blood to the heart.

Multiple choice

Which of the following statements is correct?

  1. Capillaries are the thinnest vessels and are lined by single layered epithelium.

  2. Veins do not have valves in them.

  3. Blood is the chief circulating medium of some invertebrates and all chordates.

  4. Blood is fluid connective tissue and forms 10-15% of the intra-cellular fluid.

  5. Volume of blood is about 5 litres in an adult person and it forms about 17-18% of the total body weight.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This statement is correct.

Multiple choice

Which of the following pair is not correctly matched?

  1. Largest vein in human body – superior vena cava

  2. Largest artery – dorsal aorta

  3. Smallest blood vessel – capillary

  4. Renal vein – carrier of least amount of urea

  5. Hepatic vein – carrier of maximum amount of urea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the incorrectly matched pair. Largest vein in human body – inferior vena cava, is the correct pair.

Multiple choice

What is blood pressure?

  1. The pressure of blood on the heart muscles.

  2. The pressure of blood exerted on the walls of arteries and veins.

  3. The pressure of blood on the walls of veins only.

  4. The pressure of blood on the walls of arteries only.

  5. The pressure of blood on the walls of capillaries only.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct answer.

Multiple choice

Arteries are

  1. thick walled and blood flows under high pressure

  2. thin walled and blood flows under high pressure

  3. thick walled and blood flows under low pressure

  4. thick walled and blood flows at the atmospheric pressure

  5. thin walled and blood flows under low pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct answer.

Multiple choice

Why are arteries thicker than veins?

  1. Because oxygenated blood is heavier than deoxygenated blood

  2. Because they contain more volume of blood

  3. Because they receive blood at high pressure

  4. Because there are no valves in arteries
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Arteries are thicker than veins because they receive blood at very high pressure from the heart and supply it to the whole body.

Multiple choice

Which among the following does not characterise the circulation of blood by human heart?

  1. The heart regulates the amount of vasodilation or vasoconstriction of the coronary arteries.

  2. During the ventricular systole, the subendocardial coronary vessels are compressed due to the high intra-artirial pressures.

  3. If the posterior descending artery is supplied by the circumflex artery (CX), then the coronary circulation is termed as left-dominant.

  4. The papillary muscles are attached with the mitral valve.

  5. The majority of vasculature in the body constricts to norepinephrine.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Correct Answer: During the ventricular systole, the subendocardial coronary vessels are compressed due to high intra-arterial pressure.