The human body is organized into systems that work together: the cardiovascular system circulates blood and oxygen, the respiratory system handles breathing and gas exchange, the digestive system breaks down food for energy, the musculoskeletal system provides structure and movement, and the nervous system coordinates everything through the brain and nerves, among others. Medical terminology is built from Latin and Greek word parts; for example, 'cardio' refers to the heart, '-itis' means inflammation (as in appendicitis), and '-ectomy' means surgical removal (as in appendectomy), so learning common roots lets you decode unfamiliar terms. Using standardized terminology, rather than informal descriptions, reduces the chance of miscommunication between support staff, nurses, and doctors, which directly affects patient safety.