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प्रश्न
Given below is a simple diagram of the circulation of blood in a mammal showing the main blood vessels, the heart, lungs, and body tissues. The blood vessel labeled 6 contains deoxygenated blood and 2 the valve leading to it has three semi-lunar pockets.
(i) Name the blood vessels of organs marked by numbers 1 to 8.
(ii) What do you mean by the term ‘double circulation’ of blood in mammals?
(iii) What is diastole?
उत्तर
(i)
1. Veins from tissues.
2. Superior vena cava
3. Aorta
4. Right ventricle
5. Left ventricle
6. Pulmonary Artery
7. Pulmonary vein
8. Lungs.
(ii) The heart is said to have double circulation because the blood passes through the heart twice.
(a) It first leaves t.rough the right ventricle, goes to the lungs and then returns to the left auricle of the heart (pulmonary circulation).
(b) It leaves through the left ventricle, circulates through the body, and again returns to the right auricle of heart (systemic circulation).
(iii) Diastole is the phase of relaxation of the heart muscles during which the heart chambers fill with blood and the supply of blood to the cardiac muscle is improved.
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संबंधित प्रश्न
Write the function of valves present in between atria and ventricles.
Put a tick mark (✓) against the correct alternative in the following statement:
Pulmonary vein carries :
Fill in the blank.
___________ carry pure blood.
Describe the functions of Platelets.
Name the instruments used for measuring pulse.
Which type of blood flows through pulmonary veins?
Arteries carry oxygenated blood except ______.
From where to where do the following blood vessel carry blood?
Renal artery
Name these:
Three kinds of blood vessels.
Name the following:
The blood vessel which starts from capillaries and ends in capillaries.
