Which tunic of an artery is most responsible for maintaining blood pressure and continuous blood circulation?

How can a person  best  reduce the risk of injuries on the road?  

Who could you talk to if you were concerned about your own mental health or that of a loved one?

Stuart runs with his brother each morning, and they can only speak one or two words at a time between multiple deep breaths. which best describes their heart rates during this activity? low moderate vigorous dangerous