Question

The heart, liver, and stomach are each examples of

A. a tissue.
B. an organ system.
C. a nerve.
D. an organ.

Answer 1

The correct answer is D. an organ

This is NOT an example of an organ system, as a system implies that they work together for a common goal; your heart has nothing to do with your digestive system.

I got a 100% on my test, so I know this is correct.

Answer 2

The answer is
B. an organ system