Excretion

Question 0

Toxic substances

Answer 0

Toxic substances are poisonous and can harm the cells of the body if not removed

Question 1

Excretion

Answer 1

Is one of the characteristics of all living things. Excretion is the removal of toxic chemical substances, which are made in the body during metabolism

Question 2

We have 3 excretory organs

Answer 2

Kidneys Lungs Skin

Question 3

Kidneys

Answer 3

The kidneys filter ( remove urea and salts ) as they clean our blood
This process is called filtration
If your kidneys are damaged you may need to go on a dialysis machine

Question 4

Urea

Answer 4

Which is toxic , is produced in the liver from excess protein

Question 5

Lungs

Answer 5

Carbon dioxide and water are waste products of the process of respiration in all the cells of the body.
They are carried to the lungs by the blood to be excreted

Question 6

Test for carbon dioxide

Answer 6

Limewater

Question 7

Test for water

Answer 7

Cobalt chloride paper

Question 8

Skin

Answer 8

Human skin has sweat glands which lead to pores at the surface - water , salt and a tiny amount of urea is excreted as sweat through these pores