TOPIC 2 DIGESTIVE SYSTEM IN HUMAN – Biology Notes Form Two New
The digestive system of human refers to the human alimentary canal and the organs and glands associated with it.
Some common terms concerned with the movement of food along the alimentary canal.
➢ Ingestion. This is taking in food to the mouth
➢ Digestion. This is the process by which food is broken down to small particles which are absorbed and assimilated in the body.
➢ Absorption. This is the process by which soluble end products of digestion diffuse into the blood stream.
➢ Assimilation. This is the incorporation of products of digestion into the cell metabolism.
➢ Egestion. This is the process by which indigested food particles are removed from the body through the anus.
PARTS OF THE HUMAN DIGESTIVE SYSTEM AND THEIR ADAPTIVE FEATURES
The main parts are:-
- Mouth
- Oesophagus
- Stomach
- Small intestine, (duodenum and ileum),
- Large intestine (colon) and rectum.
TOPIC 2 DIGESTIVE SYSTEM IN HUMAN – Biology Notes Form Two New
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