Blood, the heart, circulation and respiration

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Question 6
Easy

Figure 1 shows a cross-section of a capillary as seen under an electron microscope.

A high-magnification cross-section of a capillary. The capillary wall is extremely thin, consisting of a single layer of endothelial cells (one cell thick) with a visible nucleus, surrounding a narrow central lumen just wide enough for a single red blood cell.

Explain how the structure of this blood vessel is related to its function.

[2]

Blood, the heart, circulation and respiration Questions

  1. GCSE
  2. /Biology
  3. /Blood, the heart, circulation and respiration