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The circulatory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe circulatory system1 Mark
MCQ
Which of the options is/are correct for the given diagram?
Image
  • ✓
    A-Artery B-Vein C-Capillary
  • B
    1- External layer 2-Lumen 3- Middle layer 4- Internal layer
  • C
    C-capillary - Capillary collapse when gets empty
  • D
    All of the above
✓

Answer

Correct option: A.
A-Artery B-Vein C-Capillary
(a) A-Artery B- Vein C-Capillary
Explanation:
Veins: Walls are thinner than arteries and less muscular.
They have a wider lumen.
Arteries: Walls are thick and muscular to withstand high pressure.
They have a narrow lumen (the central blood-containing space).
Capillaries: These are the thinnest blood vessels, with walls being only one cell thick.
They have a very small lumen, just wide enough for single blood cells to pass through.

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