Final answer:
The best description of cardiovascular fitness is the ability of the body to transport oxygenated blood efficiently. Cardiovascular fitness refers to the ability of the cardiovascular system to efficiently deliver oxygenated blood to the body's cells.
Step-by-step explanation:
The best description of cardiovascular fitness is B. the ability of the body to transport oxygenated blood efficiently.
Cardiovascular fitness refers to the ability of the cardiovascular system (heart, blood vessels, and blood) to efficiently deliver oxygenated blood to the body's cells. This is important because every cell in the body relies on oxygen to produce energy for its functions. Aerobic exercise, such as running, swimming, or biking, is one way to improve cardiovascular fitness.
For example, during aerobic exercise, the heart pumps more blood, and as a result, more oxygen is delivered to the muscles. This helps the body to do prolonged work and improves overall cardiovascular fitness.