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37. The figures given below show diagrammatic cross-sections of three kinds of blood vessels
37. The figures given below show diagrammatic cross-sections of three kinds of blood vessels
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37. The figures given below show diagrammatic cross-sections of three kinds of blood vessels
  • Identify the blood vessels A, B and C.
  •  Name the parts labeled 1-4.
  • Mention two structural differences between A and B.
  •  Name the kinds of blood that flow through A and through B respectively.
  •  In which one of the above vessels referred to in (a) above does the exchanges of gases actually take place?

Solution –

  • A represents Artery

B represents Vein

C represents Capillary

  • 1 represents External layer made of connective tissue

2 represents Lumen

       3 represents Middle layer of smooth muscles and elastic fibres

       4 represents Endothelium

  • Difference
ArteryVein
BranchedUnited
Have thick and muscular wallsHave thin and less muscular walls as compered to arteries
  • Arteries A carry fully oxygenated blood and Veins B carries partially deoxygenated and CO2 laden blood.
  • At the capillary level
i

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