Answer:
Blood
Explanation:
The circulatory system is made up of blood vessels that carry blood away from and towards the heart. Arteries carry blood away from the heart and veins carry blood back to the heart. The circulatory system carries oxygen, nutrients, and hormones to cells, and removes waste products, like carbon dioxide
It is important to know its flexibility before starting a training regime to know its limits and its evolution.
The flexible muscles allow a fluidity in the execution of the movements and a greater mobility of the articulations. Good flexibility reduces the risk of injury because a soft muscle responds better to sudden stretching. Having good muscular flexibility helps to maintain a good posture.
It is important to know that there are better times for stretching. Often, after intense interval or long distance running, the muscle fibers may have microdissections. It is then recommended to wait at least four hours after an intense effort and 24 hours after a very intense effort. The best time to stretch muscles is during recovery days or after a short-duration, low-intensity workout.
C because it’s true and it really is the only one that makes sense... lest face it