As your blood travels in your body, it becomes polluted with wastes. Eventually it enters your kidneys. The blood is cleaned by it. Your kidneys remove waste, then sending the blood into the bladder as urine. It takes about 45 minutes for your kidneys to filter all the blood in your body.

The adult kidney is about 7.5 in. long

The bladder is a flexible bag made of a web of muscles. Urine collects in the bladder until it exits out of the body through the urethra. When your bladder fills to 100% capacity a voluntary muscles becomes in voluntary and you in instantly urine

The urethra is a tube than carries urine to the bladder and out the body.

The Ureters transport urine from the kidney to the bladder. They are also a yellowish color that comes from the renal helium.

The eccrine a small sweat gland that produces only a fluid, restricted to the human skin.

Lungs give off carbon dioxide, a bodily waste during respiration.

1 How many kidneys are in the excretory system?

Answer: 2 kidneys 2 Which Kidney is bigger? Answer: left kidney 3 What can you do to keep the

excretory system healthy? Answer: Excrete the waste stored in it.

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http://www.sciencekids.co.nz/images/pictures/humanbody/kidneys.gif

http://medcell.med.yale.edu/histology_old/skin/images/eccrine_sweat_gland.jpg