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tester [92]
2 years ago
6

What are four principle functions of the respiratory system?

Health
2 answers:
Allisa [31]2 years ago
8 0
External  is one of them
Aloiza [94]2 years ago
5 0
1. External respiration exchanges gases between bloodstream and lungs
2. Internal respiration exchanges gases between bloodstream and body tissue.
3. Air vibrating in vocal cords causes sound
4. Olfaction.
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