Why are sexual transmitted diseases serious?

If you see someone who is injured at a workplace, the first thing you should do is a. call 9-1-1 or your local emergency number b. begin to administer first aid c. check the scene for danger d. try to discover what is wrong with the person select the best answer from the choices provided a b c d

Arm circles are often effective dynamic stretches for swimmers because they

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?