The heart is an example of which level of organization within an organism? a. cell b. organ c. tissue d. organ system : )

The heart is an organ

issues are further organized in organs, the third level of organization in living things. Organs are groups of different tissues that work together. Your heart, for example, is an organ made up of muscle tissue, blood tissue, and nerve tissue.

the sun d the answer is sun

answer; i believe the answer is (polygenic inheritance;