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Science Year 4 Practice 2 Humans
2.2 Excretion and Defecation
A The diagram below shows the processes that occur in the human body.
1. Complete the chart below, then answer the following questions. PL 2
Removal of waste products from the human body
through
by
by
Waste product Waste product Waste product Waste product
2. What is the meaning of excretion?
Excretion is the process of removing from the .
3. What is the meaning of defecation? PL 1
Defecation is the process of removing from the .
4. What is the difference between excretion and defecation?
Excretion removes from the body, whereas defecation removes
food from the body.
5. What is the difference between the anus and the other excretory organs?
Faeces is not in the anus. The anus only faeces.
6. A patient informs his doctor that he has difficult urinating. Circle the condition this patient might
have.
Constipation Food poisoning Kidney stones
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