Answer:

B. Kidneys.

Explanation:

The kidneys main job is to cleanse the blood of toxins and transform the waste into urine. Each kidney weighs about 160 grams and gets rid of between one and one-and-a-half litres of urine per day. The two kidneys together filter 200 litres of fluid every 24 hours. to the blood.

The five main functions of the kidneys are:

•remove waste products from the body.

•remove drugs from the body.

•balance the body's fluids.

•release hormones that regulate blood pressure.

•and to produce an active form of vitamin D that promotes strong, healthy bones.

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