The Excretory System
A Grade 12 science worksheet covering the human excretory system, including its organs, functions, and related processes.
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The Excretory System
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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 as needed.
Observe the diagram of the human excretory system below. Identify and label the indicated organs.
1.
2.
3.
4.
1. Which of the following is the primary function of the kidneys in the excretory system?
Producing digestive enzymes
Filtering waste products from the blood
Storing bile
Regulating body temperature
2. The functional unit of the kidney responsible for filtering blood is the:
Ureter
Bladder
Nephron
Urethra
1. The process of maintaining a stable internal environment in the body is called .
2. Urine is transported from the kidneys to the bladder via tubes called .
3. The outer layer of the kidney is known as the renal .
1. Describe the role of ADH (Antidiuretic Hormone) in the regulation of water balance by the kidneys.
2. Explain how the liver contributes to the excretory process, even though it is not part of the urinary system.
1. The glomerulus is responsible for the reabsorption of useful substances back into the blood.
True
False
2. Dialysis is a medical procedure used to remove waste products from the blood when kidneys fail.
True
False
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