Biology for IGCSE & O level - Transport In Animals (Section 4 - No. 2) | ExamPlay

Biology for IGCSE & O level - Transport In Animals (Section 4 - No. 2)

Which blood vessels have the thickest walls?

Arteries

Veins

Capillaries

Venules

Explanation

Arteries have the thickest walls to withstand the high pressure of blood.

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