Question
Biology Question on Circulatory Pathways
Systemic heart refers to
the two ventricles together in humans
the heart that contracts under stimulation from nervous system
left auricle and left ventricle in higher vertebrates
entire heart in lower vertebrates
left auricle and left ventricle in higher vertebrates
Solution
Higher vertebrates exhibit double circulation of blood namely systemic and pulmonary circulation. Systemic circulation involves the distribution of oxygenated blood via the aorta from the heart to all parts of the body, and the collection of deoxygenated blood from all parts of the body through the great veins into the heart. Pulmonary circulation denotes the route impure blood takes from the heart to the lungs for purification and then back to the heart, the left auricle receives oxygenated blood and passes it to the left ventricle. The left ventricle pumps the pure blood to all parts of the body through aorta. Hence these two chambers involved in systemic circulation are referred to as systemic heart.