Provide an overview of cardiovascular conditioning, briefly describing the major relationships among the heart, circulatory system, and lungs

Answer 1

To meet your body's increased oxygen needs during aerobic exercise, your heart must pump oxygen-rich blood to muscles at a faster pace than normal. This increased demand on the heart makes the heart stronger and increases its endurance. In addition, aerobic exercise improves the endurance of the lungs and the muscles along the arteries and in the walls of the digestive tract and, of course, the muscles directly involved in the activity. These all-over improvements are called cardiovascular conditioning or the training effect.

Delivery of Oxygen by the Heart and Lungs to the Muscles
The more fit a muscle is, the more oxygen it draws from the blood. That oxygen is drawn from the lungs, so the person with more fit muscles extracts more oxygen from the inhaled air than a person with less fit muscles. The cardiovascular system responds to the demand for oxygen by building up its capacity to deliver oxygen. Researchers can measure cardiovascular fitness by measuring the amount of oxygen a person consumes per minute while working out, a measure called VO2 max.

1 . The lungs deliver oxygen to the blood.
2 . The circulatory system carries the oxygenated blood around the body.
3 . The muscles and other tissues remove oxygen from the blood and release carbon dioxide into it.
4 . The blood carries the carbon dioxide back to the lungs.
5 . The lungs remove carbon dioxide, making the blood ready to be reloaded with oxygen.