The correct answer to this open question is the following.
Although you forgot to attach the options for this question, we can answer the following.
The system that is mainly responsible for the transport of plasma to the kidneys is the circulatory system.
It is true that Kidneys are part of the excretory system in the human body. They purify the impure blood and send it back to the rest of the body. They do this through the formidable circulatory system that sends blood and nutrients to all organs of the human body.
That is why it is important to take care of our kidneys on a daily basis. Drink a lot of water. Water cleanses your kidneys and removes impurities.
And another good recommendation is not to remain seated for a long period of time. Stand up regularly and do some moderate exercise.
