Question

the heart is an example of which level of organization within an organism?
cell
organ
tissue
organ system

Explanation:

The heart is made up of different types of tissues working together to perform a specific function. In the biological levels of organization, cells make up tissues, tissues make up organs, and organs make up organ - systems. The heart is an organ as it is a distinct structure with a specific function in the body, such as pumping blood.

Answer:

B. organ