February/March 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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30Heart CirculationMedium1 mark
The photomicrographs show transverse sections through three different types of blood vessel. All are shown at approximately the same magnification.
type 1: transverse section of a blood vessel with a moderately thick wall of wavy concentric layers and a fairly wide, irregular lumen
type 2: transverse section of a blood vessel with a very thick, densely packed wall and a small, rounded lumen
type 3: transverse section of a blood vessel with a thin wall and a large, flattened lumen
Which row correctly identifies the three different types of blood vessels?
type 1type 2type 3
Aelastic arterymuscular arteryvein
Bmuscular arteryelastic arteryvein
Cmuscular arteryveinelastic artery
Dveinmuscular arteryelastic artery