Deoxygenated blood comes into the right atrium via the superior vena cava.
Answer: Some reasons for why we should being wearing masks is that it protects us from diseases. It doesn’t completely help us, but it does lower the chance by a lot of getting sick. It protects us from sicknesses from other people as well. When you cough, sneeze, or talk sometimes you can get some of you’re spit or mucus from the nose into the mouth of a person near you. Even if you do not have any sicknesses it is helpful to wear a mask so you do not. The type of material in a mask is important as well. If it may have a vent or something of the sort of in it, air and mucus can still get into the mask. One more reason you should wear a mask is that it could save you’re life.
CPR stands for CardioPulmonary Resuscitation.
Hello!! Schools that use a no-tolerance policy are followed by consequences. My school has no-tolerance policies for drugs, alcohol, bullying, etc. If you are caught with any of these, then you will suspended or expelled, depending on the seriousness of the charge. Basically, if schools have these policies, it will be followed by a serious consequence given by the principal/teacher. I hope I have helped!! Let me know if you have any more questions. Have a great day. :)