Tag: circulatory system

Questions Related to circulatory system

Which blood vessels have the smallest diameter?

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Capillaries

  2. Arterioles

  3. Venules

  4. Lymphatic

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Correct Option: A

A vein differ from an artery in having

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Strong muscular walls

  2. Narrow lumen

  3. Valves that control direction of blood flow opposite to heart

  4. Valves that control direction of blood flow towards heart

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Correct Option: C
Explanation:

Veins drain capillaries in the tissues and organs and return the blood to the heart. Veins have a unique structural feature which is not present in arteries. They are equipped with one way valves, that prevent the back flow of blood.

In which of the following character a vein differs from an artery?

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Having valves to control flow of blood

  2. Having narrow lumen

  3. Having muscular wall

  4. Having pigmented wall to give dark look

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Correct Option: A
Explanation:

Arteries carry blood from the ventricles (pumping chambers) of the heart out to the capillaries in organs and tissue. The smallest arteries are called arterioles.Veins drain capillaries in the tissues and organs and return the blood to the heart. The smallest veins are the venules.
Veins have a unique structural feature not present in arteries. They are equipped with one-way valves that prevent the backflow of blood.

So, the correct answer is option A.

An artery can be distinguished from a vein in having

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Thicker wall

  2. Oxygenated blood

  3. More haemoglobin

  4. Both A and B

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Correct Option: D
Explanation:
  • An artery carries oxygenated blood from the heart to different parts of the body. It has thick walls that allow it to withstand the high pressure of the blood.
  • Veins carry the deoxygenated blood from the different parts of the body to the heart which is further carried by the pulmonary artery for oxygenation. The veins have thin and elastic walls.
So, the correct answer is option D.

Arteries are the

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Blood vessels which carry only oxygenated blood

  2. Blood vessels which carry only deoxygenated blood

  3. Blood vessels which carry blood from the heart to different organs of the body

  4. Blood vessels which carry blood from different organs of the body to the heart

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Correct Option: C
Explanation:
Arteries carry oxygenated blood away from the heart to the tissues, except for pulmonary arteries, which carry blood to the lungs for oxygenation (usually veins carry deoxygenated blood to the heart but the pulmonary veins carry oxygenated blood as well.
So, the correct option is 'Blood vessels which carry blood from the heart to different organs of the body'.

Deoxygenated blood

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Flows to lungs from the left side of the heart.

  2. Flows to lungs from the right side of the heart.

  3. Flows to right side of the heart from the lungs.

  4. Flows to left side of the heart from the.lungs.

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Correct Option: B
Explanation:
Deoxygenated blood leaves the heart, goes to the lungs, and then re-enters the heart. Deoxygenated blood leaves through the right ventricle through the pulmonary artery. From the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.
So, the correct option is 'Flows to lungs from the right side of the heart'

In which of the following ways do the veins differ from the arteries in mammals?

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Thicker walls

  2. Deeply present

  3. Carry blood away from heart

  4. Internal valves

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Correct Option: D
Explanation:

Veins have thin walls as compared to arteries and are superficially located. They carry deoxygenated blood towards the heart and have valves which prevent blood from going backward. Arteries are elastic and thick because they need to transport high-pressure blood while in veins blood flows in low pressure. 

So, the correct answer is option D.

Blood vessels which carry blood from different organs of the body to the heart

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Veins

  2. Arteries

  3. Capillaries

  4. None of the above

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Correct Option: A
Explanation:
  • These are blood vessels that take blood back to the heart,  this blood contains less oxygen and is rich in waste products that are to be excreted or removed from the body. Veins become larger as they get closer to the heart. The superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood from the abdomen and legs into the heart.
So, the correct option is 'Veins'.

Blood vessel carrying blood from the lungs to the heart is

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Pulmonary artery

  2. Pulmonary vein

  3. Coronary artery

  4. None of the above

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Correct Option: B
Explanation:
A blood vessel carrying blood from the lungs to the heart is pulmonary vein. There are four pulmonary veins, two from each lung that drains into the left atrium of the heart. Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart. This differentiates the pulmonary veins from other veins in the body, which are used to carry deoxygenated blood from the rest of the body back to the heart.
So, the correct answer is 'Pulmonary vein'.

The left auricle opens into left ventricle through an aperture guarded by

evs transportation in living organisms circulatory system and organs blood and blood vessels circulatory system blood pressure

  1. Tricuspid valve

  2. Bisuspid valve

  3. Mitral valve

  4. Both B and C

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Correct Option: D
Explanation:

Bicuspid valve is another name for mitral valve. This valve is the valve between the left atrium and the left ventricle of the heart. It is composed of two triangular flaps, that is located between the left atrium and left ventricle and regulates blood flow between these chambers. 
Therefore, the correct answer is option D.