The spinal cord acts as the information highway, shuttling messages from the brain to the periphery at speeds of up to 270 miles per hour. The body also possesses a "second brain"—the enteric nervous system, a mesh of 500 million neurons lining the gastrointestinal tract, which governs digestion independently of the central brain.
Beyond the systems, the human body performs daily miracles we take for granted: The Human Body
While the human body is often perceived as a solid structure, it is scientifically characterized as a complex mixture of solids, liquids, and gases. Approximately of the human body consists of solid matter , while the remaining 60–70% is composed of fluids, primarily water. Molecular and Elemental Composition The spinal cord acts as the information highway,
Your kidneys and liver work around the clock to clean your blood, removing waste products like urea and carbon dioxide to keep your internal environment stable. 🏃 The Evolutionary Mismatch Approximately of the human body consists of solid
Scientists typically divide the human body into 11 major systems: