Final answer:
Adequate delivery of oxygen to working muscles during exercise via the heart, blood vessels, and lungs is referred to as aerobic exercise.
Step-by-step explanation:
Adequate delivery of oxygen to working muscles during exercise via the heart, blood vessels, and lungs is referred to as aerobic exercise. Aerobic exercise is physical exercise that depends primarily on the aerobic energy-generating process, which uses oxygen to meet energy demands during exercise. Examples of aerobic exercise include running, swimming, cycling, and walking.