Question

Q.23. Observe the diagrammatic representation of double circulation and answer
the given questions.
Pulmonary
Superior &
veins
Heart
inferior vena cave
Right Left
atrium atrium
Body
Lungs
Right Left
organs
ventricle ventricle
Pulmonary
Dorsal
artery
aorta
Pulmonary
Systemic
circulation
circulation
(i) What are the two main routes of double circulation?
(ii) Which blood vessels carry deoxygenated blood to heart and oxygenated
blood to body organs?
(iii) Why is it called double circulation?
22
Cive
ientific reasons​

Answer 1

Answer:

Here's your answer

Explanation:

i) The two main routes of double circulation are:-

• Pulmonary Artery: It takes deoxygenated blood to the lungs.
• Aorta: It carries oxygenated blood to the body tissues.

ii) Arteries and veins are the blood vessels that carry deoxygenated blood to heart and oxygenated blood to body organs.

iii) It is called double circulation because blood passes through the heart twice per circuit.

Answer 2

i) Two main routes of double circulation are:

• Through the lungs
• To the rest parts of the body

The deoxygenated blood flows from heart through the lungs where the blood becomes oxygenated allowing the blood to flow to the rest part of the body.

On the other hand, the deoxygenated blood after respiration is pumped into the heart from the body organs.

ii) All veins except pulmonary vein carry deoxygenated blood to heart and all arteries except pulmonary artery carry oxygenated blood to body organs.

Blood vessels are of three types:

• Arteries
• Veins
• Capillaries

iii) It is called double circulation because the blood circulates twice through the heart repeating the cycle again.