Excretion is the removal of substances from plants, animals and other living organisms. In humans, the skin, lungs and kidneys are excretory organs.
Why do plants produce carbon dioxide and oxygen?
Which of the following is an important function of stomata in a leaf?
Which substance is excreted from the lungs?
What does urine contain?
Which tube in the urinary system goes from the kidney to the bladder?
Where is the glomerulus found?
What does the filtrate in the Bowman's capsule contain?
Where does selective reabsorption of glucose happen in the kidney nephron?
What happens if the blood plasma is too concentrated?
Which blood vessels supply the kidneys?