When lungs evolved in vertebrates,the evolution of _____ also occurred in the circulation of blood within those vertebrates.
A)double circulation
B)red blood cells
C)a lymphatic system
D)a muscular heart
E)more plasma

Question

Quizplus · Accepted Answer

Double circulation is a system in which blood passes through the heart twice in each circuit of the body. This is necessary to supply sufficient oxygen to the oxygen-hungry tissues of the body. Therefore, as the lungs evolved in vertebrates, the evolution of double circulation also occurred in the circulation of blood within those vertebrates.

When Lungs Evolved in Vertebrates,the Evolution of _____ Also Occurred