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Solved 2015 Question Paper ICSE Class 10 Biology — Question 5

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Question 4(a)

The diagrams given below are cross sections of blood vessels: [5]

The diagrams given below are cross sections of blood vessels. Identify the blood vessels A, B and C. Name the parts labelled 1 to 3. Name the type of blood that flows through A. Mention one structural difference between A and B. In which of the above vessels does exchange of gases actually take place? ICSE 2015 Biology Solved Question Paper.

(i) Identify the blood vessels A, B and C.

(ii) Name the parts labelled 1 to 3.

(iii) Name the type of blood that flows through A.

(iv) Mention one structural difference between A and B.

(v) In which of the above vessels does exchange of gases actually take place?

Answer

(i) The blood vessels A, B, C are:

  • A → Artery
  • B → Vein
  • C → Capillary

(ii) Parts labelled 1 to 3 are:

  • 1 → Connective tissue / Tunica externa
  • 2 → Lumen
  • 3 → Muscular tissue / Tunica media

(iii) Oxygenated blood flows through A.

(iv) Arteries have narrow lumen whereas Veins have wide lumen.

(v) Capillary (i.e., blood vessel C marked above)