Fig. 6.1 shows a structure found in part of the alimentary canal. [Figure 6.1]

Mark scheme

Marking points from the official mark scheme (May/June 2015). The mark or mark type is shown in brackets.

1. [2] villus / villi;
2. [2] small intestine / ileum ;
3. [max 8] increased surface area;
4. [max 8] many/good supply + capillaries/blood;
5. [max 8] lacteal;
6. [max 8] absorption;
7. [max 8] two marks for two correctly named absorbed products ;; A amino acids/glucose/fatty acids/glycerol/vitamins/minerals/water
8. [max 8] one cell thick/thin walls;
9. [max 8] reduced distance/increased speed of molecular movement AW;
10. [max 8] diffusion;
11. [max 8] active transport;
12. [max 8] goblet cells;
13. [max 8] mucus + lubricate AW;
14. [max 8] production/release + enzymes;
15. [max 8] ref digestion + named products;