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Each body system has organs with specific jobs: the heart and blood vessels circulate blood; lungs exchange oxygen and carbon dioxide; stomach and intestines digest food; brain and nerves control body functions; kidneys and bladder remove waste; bones support and protect; muscles enable movement; glands secrete hormones; lymph nodes and spleen fight infection; and reproductive organs produce gametes and support reproduction.
Added 110 days ago|10/3/2025 12:31:49 PM
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