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A major feature that makes capillaries suitable for gaseous exchange is their:

A major feature that makes capillaries suitable for gaseous exchange is their:
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A Lignified walls
  • B Wide empty cavities
  • C Narrow lumen and thin walls
  • D Thick muscular layers
Correct Answer: Option C
Explanation:
Capillaries possess very thin walls and narrow lumens, allowing efficient diffusion of gases between blood and tissues.

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