Why does the body need all these systems? The answer is —the maintenance of a stable internal environment despite changes in the external world.
Before diving into specific systems, one must understand how the human body is organized. Human anatomy and physiology are governed by a strict hierarchy, ranging from the microscopic to the macroscopic. human anatomy and physiology
Consisting of bones, cartilages, and joints, this system provides a framework for movement, protects vital organs (like the brain and heart), and is the site of blood cell formation. The Muscular System Why does the body need all these systems
Different tissues integrating to perform a complex task (the heart). Organ System Level: human anatomy and physiology