What is SPO2 in vital signs?

Can you bruise the bottom of your foot? Is clotty spotting normal? How many emergency support functions are in the EOC? What is difference between pneumonic and bubonic plague? How can an athlete's body uses water to control body temperature? Where is water absorbed or removed from the intestine? Where are the saccule and utricle located? How can pulling a muscle in your neck lead to a headache? Does the amniotic fluid empty when the fetus is delivered? What does occlusion and stenosis of basilar artery with cerebral infarction mean? If the right testicle hurts but has no lumps and also affects the kidney could there be something wrong? Why am I depressed for no reason? What is it important for water to be reclaimed from the digestive system back to the body? What causes a throat abscess? What mineral causes scurvy? How do you do the withdrawal method correctly? Prior to using an AED you should? Have women ever had their first menustration in their thirties? Is being outside in the sun bad for you when you have a cold? How do you convert the pressure 235 mmHg from pressure to torr?