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प्रश्न
Explain the difference.
Arteries and veins.
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उत्तर
|
Arteries |
Veins |
| 1. Carries blood towards organs and away from the heart. | Carries blood towards the heart and away from organs. |
| 2. Carries fully oxygenated blood | Carries deoxygenated and CO2 enriched blood. |
| 3. Blood flows with high pressure and jerks. | Blood flows with low pressure and smoothly. |
| 4. Have no valves | Have valves to prevent backflow of blood. |
| 5. Walls are elastic. | Walls are non-elastic. |
| 6. Are Deeply placed. | Are superficial. |
| 7. Branched and decreases in size. | Unites and increases in size |
| 8. Can constrict and dilate | Cannot constrict. |
| 9. Have thick and muscular walls | Have thin and less muscular walls. |
| 10. Smallest artery is called arteriole | The smallest vein is called Venules. |
संबंधित प्रश्न
Describe the function of the heart.
Given below is a diagram of a human blood smear.
Study the diagram and answer the questions that follow:
a) Name the components numbered ‘1’ to ‘4’
b) Mention two structural differences between the parts ‘1’ and ‘2’.
c) Name the soluble protein found in part ‘4’ which forms insoluble threads during clotting of blood.
d) What is the average lifespan of the component numbered ‘1’ ?
e) Component numbered ‘1’ do not have certain organelles but are very efficient in their function. Explain
Heart sounds are produced due to ______.
-
closure of tricuspid and bicuspid valves
-
rushing of blood through valves producing turbulence
-
closure of atrioventricular and semilunar valves
-
entry of blood into auricles
Name the following:
The phase of the cardiac cycle in which the auricles contract.
Given below is a certain structure, write its chief functional activity.
Bone marrow - ______.
Given below is a highly schematic diagram of the human blood circulatory system.
 |
- Which part (state the number) represents the heart? Give reason in support of your answer.
- Which numbers represent the following, respectively?
Aorta Superior vena cava Hepatic portal vein Renal Vein Pulmonary artery Stomach
True or false:
The four blood groups in human beings are A, B, AB and AO
Choose the correct alternative.
What is the minimum number of the plasma membrane that oxygen has to diffuse across to pass from air in the alveolus to haemoglobin inside a RBC?
______ is a granulocyte.
Given diagram is a schematic representation of the circulatory system in humans. Study the same and answer the questions that follow:
 |
- Label the parts 1 and 4 indicated in the diagram.
- Which of the above mentioned number is the thickest artery? Also write its name.
- Mention the number and chamber of the heart which has the thickest muscular wall.
- Which of the above numbers/structures has the maximum number of blood capillaries?
- Draw neat and labelled diagrams of the transverse section of vena cava and the part numbered as 3. Make sure to show the structural differences between these two in the diagram.
