Digestion

2. chemically digests lipids to fatty acids and glycerol
4. lymph vessel within the villus; absorbs fatty acids, glycerol and fat-soluble vitamins
6. first part of small intestine; receives bile and pancreatic juice
8. finger-like projections in ileum that absorb end-products of digestion
10. muscle in mouth that helps move food around
12. mixture of chemicals produced by glands in the mouth
17. creates pH 2 in stomach to provide optimum conditions for pepsin action
19. muscular contractions of oesophagus to squeeze food down to stomach
21. chemical reaction between sodium hydrogencarbonate and HCl
22. product of sucrose digestion by sucrase
23. leaf-shaped structure; produces enzymes and sodium hydrogencarbonate

1. increases surface area of the villus
3. produced by liver, stored in gall bladder
5. flap of tissue that moves to cover the trachea during swallowingperistalsis
7. physical digestion in mouth
9. physical digestion in duodenum, carried out by bile
11. protein molecules that speed up reactions in cells
13. enzyme that hydrolyses starch to maltose, in mouth and duodenum
14. chemically digests large polypeptides to smaller polypeptides
15. enzyme that hydrolyses protein to large polypeptides
16. substrate for maltase
18. physical digestion in stomach causes by movement of muscle in stomach wall
20. small ball-shaped structure made of food ready to be swallowed
23. protease that completes protein digestion, releasing amino acids from polypeptides
24. mixture of food and gastric juice in stomach