An atrioventricular valve prevents the back flow or leakage of blood from-

The right ventricle into the right atrium

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The left atrium into the left ventricle

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The aorta into the left ventricle

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The pulmonary vein into the right atrium

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Solution

The correct option is A The right ventricle into the right atrium
There are two atrioventricular valves, Mitral(Bicuspid valve) and Tricuspid valve. These valves maintain the flow of blood from atrium to ventricle and do not allow the backflow of blood from ventricles to atrium.

So, the correct answer is 'The right ventricle into the right atrium'.

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Similar questions

Q. Complete the following passage:

Valves function to prevent backflow of blood and maintain a unidirectional circulation of blood within the body. The (i)__________ valve separates the right atrium from the right ventricle whereas the (ii)_____________ valve separates the left atrium and left ventricle. The (iii)___________ valve prevents the backflow of deoxygenated blood from the pulmonary artery into the right ventricle while the (iv)__________ valve prevents the backflow from aorta into the left ventricle.

Q. Read the statements and select the option which best describes the process that occurs during systematic circulation.
(i) The left atrium receives the oxygenated blood through the pulmonary veins. The left ventricle pumps the blood through the aorta to various parts and the de-oxygenated blood reaches right atrium.
(ii) The left atrium receives the oxygenated blood through pulmonary veins and pumps the blood through the aorta to various parts and the de-oxygenated blood reaches the right atrium.
(iii) The left atrium receives de-oxygenated blood and pumps into left ventricles which in turn pumps into pulmonary artery for oxygenation.
(iv) The right atrium receives the de-oxygenated blood and pumps into pulmonary artery for oxygenation.

Q. Match the following chambers of the heart with the respective blood vessels:

	Column A		Column B
$1.$	Right atrium	$a .$	Pulmonary vein
$2.$	Left atrium	$b .$	Aorta
$3.$	Right ventricle	$c .$	Superior vena cava
$4.$	Left ventricle	$d .$	Pulmonary artery

Q. Pulmonary vein pours ______ blood into the left atrium.

Match the parts of the heart in Column I with the direction of flow of blood in Column II
$\begin{matrix} C o l u m n I & C o l u m n I I (i) R i g h t V e n t r i c l e & (a) P u m p s d e o x y g e n a t e d b l o o d i n t o t h e p u l m o n a r y a r t e r y (i i) P u l m o n a r y V e i n s & (b) T a k e s d e o x y g e n a t e d b l o o d (i i i) L e f t A t r i u m & (c) R e c e i v e s b l o o d f r o m d i f f e r e n t p a r t s o f t h e b o d y . (i v) P u l m o n a r y A r t e r i e s & (d) B r i n g o x y g e n a t e d b l o o d f r o m l u n g s t o t h e h e a r t . (v) L e f t V e n t r i c l e & (e) P u m p s b l o o d i n t o t h e a o r t a . (v i) R i g h t A u r i c l e & (f) R e c e i v e s d e o x y g e n a t e d b l o o d f r o m t h e p u l m o n a r y v e i n s . \end{matrix}$

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