The purpose of this period of instruction is to familiarize you with the structure and function of the oxygen transport system or OTS and cardiovascular (CV) disease risk factors that may inhibit its performance. Discussion will include the structure and function of the respiratory system (muscles used in breathing, airways, lungs) and cardiovascular system (heart, blood and blood vessels) and their roles in the transport and delivery of oxygen and nutrients to the muscles and organs for optimal health and physical performance.