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Respiratory system, xylem phloem transpiration stomata circulatory system, open ciculatory closed circulatory different heart chambers
QuizĀ by Sarah Elshamy
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Trace the air path in the respiratory system
What is the muscle that helps humans in the breathing process
When the diaphragm contracts, it moves ................ during ................ process.
When the diaphragm relaxes, it moves ................ during ................ process.