Which chamber of the heart has the thickest wall?
(a) Right atrium
(b) Left atrium
(c) Left ventricle
(d) Right ventricle

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. The valve is found between the right atrium and right ventricle while the valve is found between the left atrium and left ventricle.

Q. The _____ valve is found between the right atrium and right ventricle while the _____ valve is found between the left atrium and left ventricle.

Q. In order for the blood to flow from right atrium to left ventricle in mammalian heart, it must flow through

Q.

Question 17
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.

(a) (i)
(b) (ii)
(c) (ii) and (iv)
(d) (i) and (iii)