Gapfilling Quiz

Fill in all the gaps by dragging the words in the top bar to their correct places.
Correct answers will appear in green and incorrect answers will appear in red.
lncorrect answers may be corrected by dragging the correct word to its place in the paragraph.
   bladder      dioxide      renal      salts      skin      sweat      two      urea      ureters      urethra      waste      water   
Excretion is the removal of from the body. The body's excretionary organs are the , the lungs and the kidneys.
The skin excretes water and salts as .
The lungs excrete carbon and water.
The kidneys excrete water, salts and .
The urinary system consists of kidneys, arteries and veins, ureters, bladder and urea.
Blood enters the kidneys through the renal artery where water, and urea are removed and form urine.
The urine then passes to the via the . In the bladder, the urine is stored until it is removed from the body via the .
The kidneys also control the amount of in the body.