Oxygen in the blood
14:40
Low blood oxygen levels
50:27
Reduce dementia risk
14:44
How to Naturally Increase Oxygen - 2 Breathing Exercises
20:39
New Vitamin D paper
14:25
O2 sat and Pulse Oximetry (Strong Exam)
10:19
How to use a pulse oximeter? What do the values mean?
14:07
The Banality of Evil
8:14