'P' in the heart have thicker muscular walls than 'Q'. Also, 'R' ensure that blood does not flow backwards when the 'P' or 'Q' contract. Identify 'P','Q' and 'R'.

P: Ventricles, Q: Atria, R: Valves

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P: Atria, Q: Ventricles, R: Valves

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P: Ventricles, Q: Blood vessels, R: Atria

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P: Blood Vessels, Q: Atria, R: Valves

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Solution

The correct option is A P: Ventricles, Q: Atria, R: Valves
$∙$ Ventricles have thicker muscular walls than atria as they pump blood into various organs.
$∙$ Atria have thin walls comparatively. It receives blood returning to the heart from the body.
$∙$ Valves ensure that the blood doesn't flow backwards when the ventricles or atria contract.

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Similar questions

P in the heart have thicker muscular walls than Q do. Also, R ensure that blood does not flow backwards when the atria or ventricles contract.
P is ________

Q is ______

and R is_________

What prevents the backflow of blood inside the heart during contraction ?
(a) thick muscular walls of ventricles
(b) valves
(c) thin walls of atria
(d) all of the above

Question 18
What prevents backflow of blood inside the heart during contraction?

(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above

Q. Identify the correct option.
Statement 1: Blood from venacava and pulmonary veins enters the right and left atria respectively.
Statement 2: The aperture between the atria and the ventricles is closed by valves.

Q. Write the function of valves present in between atria and ventricles.

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