What are the signs that a person needs oxygen?

Related questions

1. Why is my oxygen level low?
2. How long does it take to die of suffocation?
3. Does oxygen level drop during sleep?
4. Which organ is most sensitive to hypoxia?
5. How long does it take to die from drowning?
6. Can you die from hypoxia?
7. Can hypoxia kill you?
8. Why is my oxygen level low at night?
9. How do you fix hypoxemia?
10. How do you treat hypoxia?

Tags

1. #oxygen
2. #heart
3. #enough
4. #including
5. #experience
6. #breath
7. #rapid
8. #breathing
9. #shortness
10. #getting
11. #symptoms