🫀 The Body's Organ Systems

What you’ll learn

1. Moving and BreathingExplain how the circulatory system transports blood and oxygen and how the respiratory system carries out gas exchange in the lungs.An organ system is a group of organs that work together for one job. The circulatory system, led by the heart, pumps blood through vessels to transport oxygen and food to every cell. The respiratory system brings air down the trachea into the lungs, where oxygen enters the blood and carbon dioxide leaves in a swap called gas exchange.
2. Fuel and ControlDescribe how the digestive system breaks down food and how the nervous system, led by the brain, controls the body.The digestive system breaks food down into tiny pieces the body can use for energy and growth as it travels from the mouth to the stomach and intestines. The nervous system is the control center, using the brain, spinal cord, and nerves to send fast signals. The brain reads information from the senses and sends out orders that direct the rest of the body.
3. Frame and MotionExplain how the skeletal system supports and protects the body and how the muscular system moves it, and how all systems work together.The skeletal system is the frame of about 206 bones that supports the body and protects soft organs like the brain, heart, and lungs. The muscular system moves the body, with muscles pulling on bones to bend, walk, and lift. All the organ systems depend on one another, working together as one living body to keep you alive.

Questions this course answers

Grounded in trusted sources

• KidsHealth
• BBC Bitesize
• Britannica Kids
• Royal Society of Biology

Every Wunder lesson is built from real, reputable sources — never invented.

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