Our body produces waste substances which go into the blood, and can be dangerous. Excretion is the elimination of these waste substances.
- The kidneys are the organs of the excretory system. These two organs filter the blood and produce urine. This is made up of water (95%) and waste substances (5%). The urine leaves the kidneys and passes through the ureters, two tubes which go to the bladder.
The urine accumulates there until it is expelled through the urethra.
- The sweat glands in the skin also help in excretion. They make sweat.
- The kidneys are the organs of the excretory system. These two organs filter the blood and produce urine. This is made up of water (95%) and waste substances (5%). The urine leaves the kidneys and passes through the ureters, two tubes which go to the bladder.
The urine accumulates there until it is expelled through the urethra.
- The sweat glands in the skin also help in excretion. They make sweat.
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