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The circulatory system — Biology STD 10 — Question

ICSE BoardEnglish MediumSTD 10BiologyThe circulatory system1 Mark
MCQ
A muscular wall is absent in:
  • ✓
    Capillary
  • B
    Arteriole
  • C
    Venule
  • D
    Vein
✓

Answer

Correct option: A.
Capillary
(a) Capillary
Explanation:
Capillaries do not have a muscular wall; they have very thin walls to facilitate the exchange of water, oxygen, carbon dioxide, and many other nutrients and waste substances between blood and tissues.

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