What is the lub-dub sound of a heartbeat? blood moving through the arteries and veins pacemaker controlling the heart rate atria contracting followed by the ventricles valves of the heart closing

Many1. why should teens be aware of health issues such as healthy sexuality, dealing with conflict, healthy decision making and cpr? 2. a) what are the 3 most important aspects/skills to learn in order to play volleyball activity well? b) explain how each aspect/skill is important when playing the game. c) describe 2 points of strategy you could use to you be successful at this activity.