Dialysis is a medical process that is used in patients experiencing lost kidney function. The primary role of a dialysis

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Dialysis is a medical process that is used in patients
experiencing lost kidney function. The primary role of a dialysis
machine is to filter out waste and excess water from the blood.
Dialysis works on the principle of diffusion across a semipermeable
membrane. Blood flows out of the patient into a dialyzer and past a
semipermeable membrane, on the other side of which dialysate fluid
flows in the opposite direction. Waste substances will pass across
the semipermeable membrane from an area of higher concentration in
the blood into an area of lower concentration in the dialysate
fluid. You are interested in writing a model that tracks the rate
of removal of the waste compound urea from blood passing through
the dialyzer. Assume that no urea passes from the dialysate back
into the bloodstream.
Please answer the following,
(a) Draw a picture of the system
(b) Label the system, surroundings, & system boundary
(c) Identify the system as open or closed
(d) Classify the system as steady state or dynamic