• Transport oxygen from the outside air to the blood • Transport carbon dioxide from the blood to the outside air
Respiratory System
• Transport oxygen, food, and other substances throughout the body • Transport some wastes to other organs for elimination • Defend the body against diseases • Connect all other organ systems
Circulatory System
• Break down food pieces into much smaller pieces (particles) so they can be absorbed and transported throughout the body
Digestive System
• Coordinate and control the actions of all organs and organ systems • Detect, process, and respond to changes in external and internal environments
Nervous System
• Remove chemical and gaseous wastes from the blood
Excretory System
Provide a moveable support frame for the body • Protect soft-tissue organs such as the heart and lungs
Skeletal System
Move bones • Move organs that contain muscle tissue (such as the heart and stomach)
Muscular System
• Protects the body’s internal environment from the external environment • Sense pain, pressure and temperature