Describe the digestion of a piece of beef rich in fat in human digestive system from
the mouth until it is absorbed in the blood stream- Biology Essay Questions
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Digestion of Beef in the Mouth
- The food is mechanically broken down by chewing and grinding
- It is moistened by saliva;
Digestion of Meat in the Stomach
In the stomach, beef is:
- mixed with gastric juice and hydrochloric acid;
- Pepsin in gastric juice breaks proteins into peptides,
- Gastric Lipase breaks down fats to fatty acids;
Digestion in the deodenum
food passed to deodenum where
- Bile salts emulsify fats;
- Pancreatic trypsin breaks protein to peptides,
- lipase breaks fats to fatty acids.
Digestion in the Ileum
- Peptidase breaks peptides to amino acids,
- Lipase breaks fats to fatty acids and glycerol.
- Absorption fatty acids absorbed into lacteal of villi while amino acids enter capillaries
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