<span>Flexible
joints are important to prevent athletic injury. Any good training program
involves flexibility exercises because this ensures that joints and its
surrounding tissues are lax and could perform at its peak during training and
competition. Warm-up flexibility exercises are called active stretches. This is
where an individual moves specific joints while simultaneously moving from one
place to another. They are done before a training program begins while,
passive stretches are done after a work-out. Passive stretches are used to
remove lactic acid build-up in muscles and also reduces the chances of having
stiff joints the day after a training session.</span></span></span>
Its used to prevent organ rejection from kidney , liver or heart transplants. you can also use it to prevent psoriasis or severe <span>rheumatoid arthritis</span>
The thymus lies in the chest behind the breastbone and above the heart. Relatively large in infancy, it increases in size until puberty and thereafter shrinks to only a few grams in old age.
