Name: _____________________
IGCSE Biology Worksheet: Excretion and the Urinary System
Section A: Understanding Excretion (4 marks)
1. Define excretion.
2. Why is excretion important for the human body? (Give two reasons)
a) b)
Section B: Dangers of Not Excreting Waste (4 marks)
3. List two waste products that need to be excreted from the body. a)
b)
4. What can happen if these waste products accumulate in the body? (Give two consequences) a)
b)
Section C: Excretory Organs (5 marks)
5. Match the excretory organ with the waste it removes. (Write the correct letter in the space provided)
Excretory Organ
Waste Removed
1. Kidneys
a) Carbon dioxide
2. Lungs
b) Sweat and urea
3. Skin
c) Bile pigments
4. Liver
d) Urea, water, salts
5. Intestines
e) Undigested solid waste
Section D: The Urinary System (7 marks)
Draw and Label the diagram of the urinary system below. (Use the words: kidney, ureter, bladder,
urethra, renal artery, renal vein)
7. Describe the function of each of the following parts:
a) Kidney
b) Ureter:
c) Bladder:
d) Urethra:
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