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Human Excretory System (Worksheet)
Q.1. What is the main function of the excretory system?
a) Hormone production
b) Transporting oxygen to the tissues
c) Removal of waste and extra fluid
d) Gas exchange
Q.2. What is the basic unit of the human kidney?
a) Alveoli
b) Neuron
b) Trachea
d) Nephron
Q.3. Label the parts of the human excretory system on the diagram below.
• Ureters
• Urethra
• Kidney
• Urinary bladder
Q.4. Which of the following organ transports urine from the kidneys to the bladder?
a) Ureter
b) Liver
c) Urethra
d) Lung
Q.5. Which of the following organ stores urine before it is removed from body?
a) Ureter
b) Kidney
c) Urethra
d) Urinary bladder
Q.6. Urine exits the body through a tube called __________.
a) Ureter
b) Kidney
c) Urethra
d) Urinary bladder
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Q.7. Which of the following statements is false?
a) The removal of the metabolic wastes and excess water of an organism is excretion.
b) All the metabolic wastes are excreted by the kidney.
c) The kidneys maintain homeostasis.
d) The role of the kidneys is to filter the blood and produce urine.
Q.8. Which of the following is NOT present in the urine of a healthy person?
a) Urea
b) Water
c) Salts
d) Red blood cells
Q.9. Which vessel carries unfiltered blood from the aorta to the kidneys?
a) Renal Veins
b) Renal Arteries
c) Renal pelvis
d) Vena cava
Q.10. Which vessel takes filtered blood away from the kidney?
a) Renal Veins
b) Renal Arteries
c) Renal pelvis
d) Vena cava
Q.11. Which of the following is NOT an excretory organ?
a) Kidneys
b) Skin
c) Stomach
d) Lungs
Q.12. Which of the following organ breaks down chemicals, poisons, and other toxins that
enter the body?
a) Skin
b) Liver
c) Lung
d) Kidney
Q.13. Which of the following organ eliminates excess water and salts in sweat?
a) Skin
b) Liver
c) Lung
d) Kidney
Q.14. Which of the following substances are excreted by the lungs?
a) Oxygen and Nitrogen
b) Carbon dioxide and Water
c) Hydrogen and Salt
d) Nitrogen and Urine
Q.15. Which of the following is NOT a disease of the excretory system?
a) Urinary tract infection
b) Anuria
c) Kidney stone
d) Pneumonia