Final answer:
The excretory system removes waste material from body cells to the blood.
Step-by-step explanation:
The excretory system functions to remove waste material from the body cells to the blood. It is responsible for filtering the blood and eliminating waste products from the body, such as urea and excess water.
The main organs of the excretory system are the kidneys, which filter the blood, and the bladder, which stores the waste material before it is eliminated through the urinary system.
Other organs that play a role in the excretory system include the lungs (which remove carbon dioxide) and the skin (which removes sweat and other waste products).
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