The blood vascular system of mammals is known as the double vascular system because:

A group of arteries carries oxygenated and other groups of veins conduct deoxygenated blood.

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Oxygenated blood runs from the heart to different organs by one set of arteries while deoxygenated blood runs from the heart to lung by pulmonary artery.

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The two different systems never meet.

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All of the above

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Solution

The correct option is D All of the above
Double circulation in a four chambered heart means that there are two circulations acting together in the cardio-respiratory system simultaneously. One circulation, is from the right ventricle to the lungs and back to the left atrium for oxygenation of the blood. The other circulation is from the left ventricle to the entire systemic circulation and back to the right atrium (oxygenated blood). In normal cases, the oxygenated and the de-oxygenated systems never mix.
So, the correct answer is option D.

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Similar questions

Q. Arteries carries oxygenated blood but pulmonary artery carries deoxygenated blood and veins carry deoxygenated blood but pulmonary vein carries oxygenated blood is it true

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.

The blood vessel which carries oxygenated blood from the lungs to the heart is :
(a) main artery
(b) pulmonary artery
(c) main vein
(d) pulmonary vein

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. Draw the diagram of human heart and label the following parts which
(i) receives deoxygenated blood from vena cava,
(ii) send deoxygenated blood to lung through pulmonary artery,
(iii) receives oxygenated blood from lungs and
(iv) sends oxygenated blood to all parts of the body through aorta.

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