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Practice Quiz · Science · Ages 11–13 · Grades 6–8
Practice quiz: The human body (ages 11–13)
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1 Which organ pumps blood around the body?
Lungs Heart Liver Kidneys
💡 The heart pumps blood through the circulatory system.
2 Where does most nutrient absorption happen?
Stomach Small intestine Large intestine Esophagus
💡 The small intestine absorbs most nutrients.
3 What gas do the lungs take into the blood?
Carbon dioxide Nitrogen Oxygen Helium
💡 The lungs take in oxygen and release carbon dioxide.
4 What is the largest organ of the human body?
Brain Liver Skin Heart
💡 The skin is the largest organ.
5 Which system includes the brain and spinal cord?
Nervous system Digestive system Respiratory system Skeletal system
💡 The brain and spinal cord form the central nervous system.