Excretory System

Question 1

What do we Excrete?

Answer 1

• Faeces
  • Urine
  • Sweat

* Carbon dioxide

Question 2

Organs in the System: Kidneys

Answer 2

• Filter blood
• Excrete urea
• Control water and salt levels

Question 3

Organs in the System: Liver

Answer 3

• Breaks down toxins and other substances into harmless ones

Question 4

Organs in the System: Lungs

Answer 4

• Excrete carbon dioxide and water

Question 5

Organs in the System: Skin

Answer 5

• Controls body heat by excreting water

* Sweat also contains a small amount of urea