What organ system is the kidney tube?

Question

I need help.

Please

Thank You!!! :)
PS: For homework I just have to complete this chart checking which organ is in what organ system. There are 22 questions, I did some in class and some right now.

Answer 1

http://kidney.niddk.nih.gov/kudiseases/pubs/Yoururinary/

Answer 2

Digestive , repiratory, excretory, reproductive, circulatory, nervous, OR endocrine

That what it says in the chart and I have to check one of them.

Answer 3

Is it excretory system?

That what I think it is.

Answer 4

Right.

Answer 5

ok

Thank You!!! :)

Answer 6

You're welcome.