Final answer:
The kidney is the organ that is part of the excretory system.
Step-by-step explanation:
The organ that is part of the excretory system is the Kidney. The kidneys are bean-shaped organs located near the middle of the back, one on each side of the spine. They play a crucial role in filtering waste products from the blood, regulating blood pressure, balancing electrolytes, and producing urine.
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