Advertisements
Advertisements
प्रश्न
Give scientific reason.
Arteries are thicker than veins.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Write one structural difference between the composition of arteries and veins.
What stops blood from flowing backwards through the heart?
Why does the heart need valves?
Put a tick mark (✓) against the correct alternative in the following statement:
Pulmonary vein carries :
Fill in the blank.
The fluid part of blood is called _______.
Which of the following statement is true (T) and which ones are false (F)? Mark T or F:
Blood group A has antigen A.
Describe the function of Blood vessels.
The blood vessel supplying blood to the kidney is the
Complete the following sentence with appropriate words:
Arteries are _____ walled and the veins are _____ walled vessels.
Name these:
Three kinds of blood vessels.
