1.) is circulatory system. An easy way to remember this is, blood circulates throughout the body, CIRCULatory.
2.) Circulatory; resspiratory.
HOpe i could help and this got to you in time! :)
I believe the first question is #4 circulatory system, number 2 is also #4 circulatory; respiratory.
Hope this helped! have yourself a great day!
