Which of the following statements is correct about renal system ?
1
The renal system includes the heart and blood vessels along with the kidneys.
2
The renal system's primary function is to regulate body temperature.
3
The principal function of the renal system is to maintain the body’s homeostasis by regulating the balance of salt and water, and removing waste.
4
The kidneys are part of the digestive system.
5
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