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प्रश्न
Give scientific reason.
Arteries are thicker than veins.
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उत्तर
- Arteries carry oxygenated blood away from the heart to the body.
- The blood pumped out by the heart is under high pressure and to withstand this pressure arteries are thick-walled.
- Veins carry deoxygenated blood from the body back to the heart.
- They are thin-walled as the blood that flows through veins is under low pressure. Hence, arteries are thicker than veins.
- Veins, on the other hand, have thinner walls and a bigger lumen since they do not need to resist high pressure like arteries.
- Furthermore, because veins convey relatively low-pressure blood, they are frequently fitted with valves to promote unidirectional blood flow towards the heart.
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संबंधित प्रश्न
Fill in the blank with suitable word given below:
The liquid part of coagulated blood is known as____________.
During surgical operations or during accidents, the patient may be given blood from outside to save his life. What is the technical name of this process ? Briefly explain the precautions to be observed and taken in this process.
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Multiple choice question. Tick (✓) the correct choice:
The blood vessels in which blood goes away from the heart to different body parts are
- arteries
- capillaries
- veins
- both arteries and veins.
Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
Platelets help in clotting of blood.
Multiple Choice Questions
Arteries are:
Identify the CORRECT statement about veins.
Which blood vessel is indicated by 'X' in the following diagram?
Identify the term that refers to the study of blood vessels.
Select the incorrect statements with respect to blood vessels.
- Capillaries are thin-walled having a single layer of ciliated epithelium.
- Arteries are pulsatile and devoid of valves.
- Portal vein starts as capillaries from one organ and ends as capillaries in another organ.
- All arteries carry oxygenated blood whereas all veins carry deoxygenated blood.
- Capillary walls bear fenestrae through which WBCs can move out by diapedesis.
Choose the correct answer from the options given below:
