Biology · General Awareness

Human Circulatory System

846 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

Which of the following statements is not true?

  1. Blood vessels entering liver are hepatic portal vein and hepatic artery.

  2. Hepatic portal veins arise from hepatic vein.

  3. Hepatic portal vein starts with capillaries and also ends in capillaries.

  4. Hepatic veins carry deoxygenated blood from liver to inferior vena cava.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hepatic portal vein is formed by the veins starting from stomach and intestines.

Multiple choice

Consider the following statements:

  1. Spleen is the blood bank of the human body.
  2. All birds have four chambered heart.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Statement 1 is correct. Spleen is called as the blood bank because it holds the reserve of blood in case of hemorrhagic shock. Statement 2 is also correct. The four chambered heart increases the efficiency of delivery of oxygenated blood to tissues by preventing mixing with deoxygenated blood.

Multiple choice

Which of the following shows the difference between veins and an arteries?

  1. Veins have narrower lumen.

  2. Veins have strong muscular wall.

  3. Veins have valves to control backflow of blood.

  4. Veins have non-collapsible walls.

  5. Direction of blood flow is from heart towards the various organs of the body through veins.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Arteries have no internal valve whereas veins have internal semilunar valves to prevent backflow of blood.

Multiple choice

Right atrium of mammalian heart receives blood from __________.

  1. sinus venosus

  2. pulmonary veins

  3. precavals

  4. postcavals

  5. precavals and postcavals
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Three large veins; the right and left anterior venecavae or precavals and a single posterior venecavae or postcaval open by separate pores into the right atium.

Multiple choice

An unpaired artery in frog is ____________.

  1. iliac artery

  2. lumber artery

  3. posterior mesenteric artery

  4. phrenic artery

  5. pulmocutaneous artery
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A single posterior mesenteric artery arises from the dorsal aorta.

Multiple choice

The growth of new blood vessels in the body is known as

  1. metastasis

  2. angiogenesis

  3. apoptosis

  4. biosynthesis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Angiogenesis is the term used to indicate the growth of new blood vessels. It is a normal and vital process in growth and development as well as in wound healing.