A. Is made up of many organ systems functioning together

In summary, the human body is made of 11 important organ systems, including the circulatory, respiratory, digestive, excretory, nervous and endocrine systems. They also include the immune, integumentary, skeletal, muscle and reproductive systems. The systems work together to maintain a functioning human body.

Organisms

Explanation:

Organ systems who function together as a group is classified as an organism.