Page 44 - Biology Form Two
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Chapter Two
FOR ONLINE READING ONLY
Digestive system
Introduction
Food taken into the body cannot be utilised by the cells unless it is broken down
and changed into simpler, soluble, and diffusible form. Digestion takes place in
the alimentary canal. In this chapter, you will learn about nutrition in human
and ruminants including their digestive systems and digestion processes. The
competences developed will enable you to practise a proper eating habit to avoid
disorders and diseases associated with the digestive system.
Think
The animal body without the digestive system
Structure of the digestive system
Task 2.1
Search the library and internet sources for information about the human digestive
system and write short notes.
The human digestive system is composed of the alimentary canal, associated
organs, and glands as shown in Figure 2.1. The main parts of the alimentary
canal are the mouth, pharynx, oesophagus, stomach, small intestine and large
intestine. The small intestine comprises the duodenum and ileum, whereas the
large intestine comprises the colon, rectum and anal canal. The associated organs
include the tongue, liver, pancreas, gall bladder and appendix. The digestive
system also contains the salivary glands.
Student’s Book - Form Two
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05/10/2024 15:36:21
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