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Mammal Respiration

2 / number of muscles used to power lungs increase / ribs move up to _______ chest cavity size decrease / ribs move down to ______ chest cavity size downward / when diaphragm contracts it pulls chest cavity ______ vibrate / mammals are able to used exhaled air to ______ vocal chords stomach muscles / _______ pull air in, and push air out mammals / All ______ use this type of respiration

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Across
3.ribs move up to _______ chest cavity size
5.when diaphragm contracts it pulls chest cavity ______
6.mammals are able to used exhaled air to ______ vocal chords
7.All ______ use this type of respiration
Down
1._______ pull air in, and push air out
2.ribs move down to ______ chest cavity size
4.number of muscles used to power lungs

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