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प्रश्न
Describe the structural differences between an artery and a vein.
Mention two structural differences between an artery and a vein.
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उत्तर
| Artery | Vein |
| An artery is a vessel that carries blood away from the heart towards any organ. | A vein is a vessel which conveys the blood away from an organ towards the heart. |
| An artery has thick muscular walls. | A vein has thin muscular walls. |
| It has a narrow lumen. | It has a broad lumen. |
| There are no valves. | Thin pocket-shaped valves are present in the veins. |
| Arteries progressively decrease in size and branch to form arterioles. Arterioles further break up to form capillaries. | Capillaries unite to form branches called Venules. Venules further unite to form veins. |
संबंधित प्रश्न
Sketch and label the T.S. of vein.
Put a tick mark (✓) against the correct alternative in the following statement:
The blood tastes saltish due to the presence of dissolved:
- Sodium chloride
- Potassium chloride
- Ammonium nitrate
- Sodium nitrate
Name the disease in which the number of platelets reduces to 25,000 – 30,000 per cubic mm of blood. State its major symptoms.
State briefly, the difference between white blood cells and the red blood cells.
Multiple choice question. Tick (✓) the correct choice:
The four blood groups in humans are
- A, B, C and D
- A, B, AB and C
- A, B, AB and O
- A, B, AB and OO
Name the main artery which carries blood to different parts of the body.
The figures given below are cross-sections of blood vessels.
(i) Identify the blood vessels A, B, and C.
(ii) Name the parts labeled 1-4.
(iii) Mention two structural differences between A and B.
(iv) Name the type of blood A that flows (a) through A, (b) through B.
(v) In which of the above vessels referred to in (iv) above does exchange of gases actually take place?
Why do veins have thin walls as compared to arteries?
From where to where do the following blood vessel carry blood?
Renal artery
Name the following:
The blood vessel which starts from capillaries and ends in capillaries.
