Biology

The correct answer is C. All of your body systems must work together to keep you healthy.

Option A, "Your body is made up of exactly seven systems," is not true. The human body consists of multiple systems, and the number of systems can vary depending on how they are classified. While there are commonly recognized major systems like the circulatory, respiratory, digestive, nervous, muscular, skeletal, and immune systems, there are additional systems such as the endocrine, urinary, integumentary, and reproductive systems, among others.

Option B, "The skeletal system is more important than any other body system," is not true. All body systems ...