The Excretory System Worksheet
A Grade 10 science worksheet focusing on the human excretory system, its organs, functions, and related processes.
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The Excretory System
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Date:
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Read each question carefully and answer to the best of your ability. Refer to the diagram of the human excretory system if needed.
The Human Excretory System
1. Which of the following is NOT a primary organ of the human excretory system?
Kidneys
Lungs
Liver
Skin
2. The functional unit of the kidney responsible for filtering blood and forming urine is the:
Ureter
Nephron
Bladder
Urethra
3. The main waste product filtered by the kidneys is , which is formed from the breakdown of proteins.
4. Urine is transported from the kidneys to the urinary bladder through tubes called .
5. The liver plays a crucial role in detoxifying harmful substances and producing urea, making it an accessory excretory organ.
True
False
6. Reabsorption of essential nutrients and water primarily occurs in the glomerulus of the nephron.
True
False
7. Briefly explain the three main processes involved in urine formation within the nephron.
Match each organ with its primary excretory function.
8. Kidneys
a. Excretion of carbon dioxide and water vapor
9. Lungs
b. Filtration of blood and urine production
10. Skin
c. Removal of excess salts and water through sweat
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