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

Which of the following carries blood from the heart to the body organs?

  1. Artery

  2. Veins

  3. Coronus

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Arteries are blood vessels that carry blood away from the heart to the body's tissues. They have thick, muscular walls to withstand the high pressure generated by the heart's pumping action. Veins carry blood back to the heart, not away from it.

Multiple choice

Which of the following carries blood from the body organs back to heart?

  1. Artery

  2. Capillaries

  3. Veins

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

Veins are blood vessels that return blood from the body's tissues back to the heart. They have thinner walls than arteries and contain valves to prevent backflow. Capillaries are tiny vessels where exchange of materials occurs, not the main transport vessels back to heart.

Multiple choice

The flow of blood in the animals having four chambered heart is called

  1. single circulation

  2. triple circulation

  3. double circulation

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

Animals with four-chambered hearts have double circulation: pulmonary circulation (heart to lungs and back) and systemic circulation (heart to body and back). This prevents mixing of oxygenated and deoxygenated blood. Single circulation occurs in fish with two-chambered hearts.

Multiple choice

The flow of blood in a fish having two chambered heart is called

  1. single circulation

  2. triple circulation

  3. double circulation

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Fish have two-chambered hearts (one atrium, one ventricle) and single circulation. Blood passes through the heart once in a complete circuit: heart → gills → body → back to heart. This is less efficient than double circulation but adequate for their aquatic lifestyle.

Multiple choice

The maximum pressure at which the blood leaves the heart through the main artery during contraction phase is called

  1. systolic pressure

  2. diastolic pressure

  3. Both a & b

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Systolic pressure is the maximum pressure in arteries during ventricular contraction (systole). This is when blood is forcefully ejected from the heart into the aorta. Diastolic pressure is the minimum during relaxation, not the maximum.

Multiple choice

Circulation of blood from the heart to the rest of body and back to heart in humans is called

  1. systemic circulation

  2. pulmonary circulation

  3. Both a & b

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Systemic circulation refers to the movement of blood from the heart to the entire body (excluding lungs) and back to the heart. Pulmonary circulation specifically involves circulation between heart and lungs. Since the question mentions 'rest of body' (not lungs), the correct answer is systemic circulation only.

Multiple choice

Circulation of blood from the heart to lungs and back to heart in human is called

  1. systemic circulation

  2. pulmonary circulation

  3. Both a & b

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pulmonary circulation specifically refers to the blood flow pathway from the heart to the lungs for oxygenation and back to the heart. Systemic circulation is the circuit to the rest of the body. The question specifically mentions 'lungs' as the destination.

Multiple choice

Blood is not known as

  1. fluid of life

  2. connective tissue in fluid form

  3. fluid of growth

  4. fluid of health

  5. fluid of brain
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Blood is not known as the fluid of brain.

Multiple choice

In a human body, where do arteries lie?

  1. Deep in the tissue.

  2. In the ligament.

  3. In the bones.

  4. In the muscles.

  5. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option. Arteries lie deep in the tissue, except at certain places they lie closer to the skin.

Multiple choice

Match the following:

 
1. Arteries a. Network of fine connecting blood vessels
2. Capillaries b. Blood vessels in which blood is carried away from the heart to different body parts
3. Veins c. Blood vessels which carry blood towards the heart

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

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

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

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

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

This is the correct option. Arteries are blood vessels in which blood is carried away from the heart to different body parts. Capillaries are a network of fine connecting blood vessels. Veins are blood vessels which carry blood towards the heart. 

Multiple choice

_____________ are the smallest blood vessels.

  1. Veins

  2. Arteries

  3. Capillaries

  4. Venules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Capillaries are the smallest vessels; in fact they are microscopic vessels which are in close contact of the body tissue.

Multiple choice

Use the correct code from the following options.

Arrange the organs of the circulatory system in a sequence through which the blood flows.

I. Heart II. Aorta III. Artery IV. Capillary

  1. IV, III, II, I

  2. I, II, III, IV

  3. II, III, IV, I

  4. III, II, I, IV
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Blood flows from the heart, through the aorta (largest artery), into smaller arteries, and finally through capillaries where exchange occurs. This sequence matches Option B. Other options reverse this logical flow.

Multiple choice

The circulatory system is the system that transports _______ around your body.

  1. water

  2. oil

  3. mineral

  4. blood
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Blood is the correct answer. The circulatory system's primary function is transporting blood throughout the body, which carries oxygen, nutrients, hormones, and waste products. Water, oil, and minerals are not the main transport medium - they are substances dissolved or carried IN the blood.

Multiple choice

The circulatory system consists of heart, blood and ________.

  1. lungs

  2. bone

  3. blood vessels

  4. ribcage
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Blood vessels are the correct answer. The circulatory system comprises three main components: the heart (pump), blood (transport medium), and blood vessels (the network of tubes). Lungs, bones, and ribcage are parts of other body systems (respiratory, skeletal).