Question

Systemic heart refers to A The two ventricles together in humans B The heart that contracts under stimulation from nervous system C Left auricle and left ventricle in higher vertebrates D Entire heart in lower vertebrates

Answer 1

The answer is (c).because systemic hert refers to systemic circulation of blood.
Which is done only through the left auricles and left ventricles combine effort.

Answer 2

Systemic heart means  the part of the heart propelling blood through the systemic circulation; specifically : the left atrium and ventricle of higher vertebrates.
Hope it helps you