Which of the following is NOT one of the essential components of a circulatory system?
A)a pump
B)a system of tubes
C)a fluid
D)oxygen

Question

Quizplus · Accepted Answer

While oxygen is necessary for the proper functioning of the circulatory system, it is not an essential component of the system itself. The three essential components of a circulatory system are a pump (such as the heart), a system of tubes (such as blood vessels), and a fluid (such as blood).

Which of the Following Is NOT One of the Essential