Yes.
I don't know that they're the main organs, but kidneys are certainly essential to the urinary system.
Kidneys
Kidneys - Urinary System
The main function of a renal vein is to carry blood from the kidneys
It's excretory system. The system's main organ is pair of kidneys.
The renal system refers to the organs responsible for filtering waste products from the blood and regulating fluid balance in the body. This includes the kidneys, ureters, bladder, and urethra. The main function of the renal system is to maintain homeostasis by filtering blood, removing waste, and producing urine.
Renal Kidneys are part of the excretory system. Which also includes the bladder, ureter, urethra. The skin and lungs are also considered excretory organs.
The main organ in the excretory system is the kidney. The kidney is the main organ that controls the excretory systems for vertebrates. It is also part of the Urinary system which is part of the excretory system.
The main organ of the excretory system is the kidneys. The kidneys filter waste products and excess substances from the blood to produce urine, which is then eliminated from the body through the urinary system.
Kidneys
Kidneys
Renal Kidneys are part of the excretory system. Which also includes the bladder, ureter, urethra. The skin and lungs are also considered excretory organs.