What organ is not part of the citculitory system urethra, kidneys or esophagus

The esophagus is not. and also the urethra is part of the urinary system.

Circulatory system is also known as the cardiovascular system. Its job is to transmit the blood to circulate and gives nutrients to our body.

The 4 major parts of the circulatory system are:

=> Heart

=> Arteries

=> Veins

=> Blood

Esophagus and kidney are part of the circulatory system because it is responsible for carrying nutrients inside our body.

Urethra is the organ that does not belong to the circulatory system. Because Urethra’s function is exits the urine in our body.