Name three features of the Alveoli that enable gaseous exchange to occur, What is the name of the blood vessels that surround the alveoli?, Explain diffusion, Why doe O2 move from the Alveoli into the blood?, Why does CO2 move from the blood to the alveoli?, What does O2 attach to in the blood?, What transports CO2 in the blood?, What are the two muscles that enable us to breathe?, Does gas move from a high concentration to a low concentration?, Does gas move from a low concentration to a high concentration?, When we breathe in what happens to the chest cavity?.

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