Take a picture of the problem. It’d be much more helpful. Sounds like a heat transfer course. I am not sure whether it is external flow over a plate surface or just natural convection is occurring. You should have some equation listed in your book dT/dy. You need to integrate that equation with respect to y to find your temperature distribution as a function of y or x or in whichever direction you are considering. The 220°C sounds like a boundary condition where T(0)=220°C. Not entirely sure what else I could give you since there is not much to go off of. Thought I’d try.
Circulatory system.....circulates blood (a vital delivery system of oxygen) throughout the whole body when tissues need it the most and with a constant supply.