Blood enters the heart through the two atria and exits through the two ventricles.

Left auricle (oxygenated blood) - lungs (deoxygenated blood) - left auricle

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Right auricle (deoxygenated blood) - lungs (oxygenated blood) – left auricle

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Solution

The correct option is A Left auricle (oxygenated blood) - lungs (deoxygenated blood) - left auricle
The upper two heart chambers are called atria. Atria are separated by an interatrial septum into the left atrium and the right atrium. The lower two chambers of the heart are called ventricles. Atria receive blood returning to the heart from the body and ventricles pump blood from the heart to the body. So Blood enters the heart through the two atria and exits through the two ventricles.

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

Q. The oxygenated blood is carried from lungs to left auricle by

Q. Which of the following statement(s) wrong with regard to heart?
A. Left atrium receives deoxygenated blood from different parts of the body while right atrium receives deoxygenated blood from the lungs.
B. Right atrium receives deoxygenated blood from different body parts while right ventricle pumps deoxygenated blood to the lungs.
C. Left atrium receives oxygenated blood from lungs while left ventricle pumps oxygenated blood to different parts of the body.
D. Pulmonary vein carries deoxygenated blood to the lungs and pulmonary artery brings oxygenated blood towards the heart.

Which of the following statement (s) is (are) true about the heart?

(i) Left atrium receives oxygenated blood from different parts of the body while right atrium receives deoxygenated blood from lungs.

(ii) Left ventricle pumps oxygenated blood to different body parts while right ventricle pumps deoxygenated blood to lungs.

(iii) Left atrium transfers oxygenated blood to right ventricle which sends it to different body parts.

(iv) Right atrium receives deoxygenated blood from different parts of the body while left ventricle pumps oxygenated blood to different parts of the body.

Q. Assertion :Amphibian heart consists of two auricles and one ventricle. Reason: The deoxygenated blood is returned to heart through sinus venosus.

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