relating to a system, especially as opposed to a particular part

the disease is localized rather than systemic

denoting the part of the circulatory system concerned with the transport of oxygen to and carbon dioxide from the body in general, especially as distinct from the pulmonary part concerned with the transport of oxygen from and carbon dioxide to the lungs

(of an insecticide, fungicide, or similar substance) entering the plant via the roots or shoots and passing through the tissues