How the Body Works

Human physiology is the study of how our organs and systems function together to keep us alive and healthy.

Major Body Systems

• Circulatory system: Moves blood, oxygen, and nutrients.
• Respiratory system: Brings in oxygen and removes carbon dioxide.
• Digestive system: Breaks down food into nutrients.
• Nervous system: Transmits signals for movement and sensation.

Importance in Everyday Life

Knowing how the body works helps us understand health, exercise, and disease prevention.