Final answer:
The human body is composed of multiple organ systems that work together to maintain homeostasis and carry out essential biological activities.
Step-by-step explanation:
The statement 'the body is made up of only four systems that all work together' is false. The human body is actually composed of multiple organ systems that work together to maintain homeostasis and carry out essential biological activities. There are 11 major organ systems in the human body, including the skeletal system, muscular system, circulatory system, respiratory system, digestive system, excretory system, nervous system, endocrine system, reproductive system, integumentary system, and immune system. Each system is responsible for specific functions and they all work together to support the overall health and functioning of the body.