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प्रश्न
Write two points of differences between arteries and veins.
उत्तर
| Arteries | Veins |
| 1. Arteries are blood vessels which carry blood away from the heart. | 1. Veins are blood vessels which carry blood towards the heart. |
| 2. Arteries are thick-walled blood vessels. | 2. Veins are thin-walled blood vessels. |
| 3. The blood flow in arteries is rapid and under higher blood pressure. | 3. The blood flow in veins is slower and under lower blood pressure. |
| 4. Arteries are situated deep inside the body. | 4. Veins are situated superficially in the body. |
| 5. Arteries do not have valves. | 5. Veins have valves to prevent the backflow of blood. |
| 6. Except for the pulmonary artery, all arteries carry oxygenated blood. | 6. Except for the pulmonary vein, all veins carry deoxygenated blood. |
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संबंधित प्रश्न
Raisins are formed by drying grapes. The process that takes place during formation of raisins from grapes is .................... .
(a) Absorption
(b) Osmosis
(c) Diffusion
(d) Dehydration
In human beings the blood goes to the heart in one cycle once.
Raisins put in water absorb water by the process of _________.
(a) diffusion
(b) osmosis
(c) transpiration
(d) excretion
The percentage of water absorbed by raisins is calculated on dividing …………. by initial weight.
(a) Final weight
(b) Increased weight
(c) Decreased weight
(d) None of the above
Draw a neat labelled diagram of vertical section of the human heart.
______________ artery takes the blood to the lungs for oxygenation.
Fill in the blank and rewrite the completed statement:
____________ artery takes the blood to the lungs for oxygenation.
