Descending colon. The colon is part of the large intestine, the final part of the digestive system. Its function is to reabsorb fluids and process waste products from the body and prepare for its elimination.The colon consists of four parts: descending colon, ascending colon, transverse colon, and sigmoid colon.escending colon. The colon is part of the large intestine, the final part of the digestive system. Its function is to reabsorb fluids and process waste products from the body and prepare for its elimination.
The USDA's Recommended Dietary Allowance (RDA) for protein is .8 grams per kilogram (or .36 grams per pound) of body weight. But that's not enough for athletes, according to the ISSN, which says endurance athletes like runners need 1.0 to 1.6 grams per kilogram a day (or .45 to .72 grams per pound).
Regardless, the teen runner will need 0.5 to 1 grams of protein per pound of body weight per day. So if your child weighs 120 pounds, he should have a daily protein intake of 60 to 120 grams of protein. Examples of proteins are fish, meat, and tofu. To reach this protein requirement, a teen runner should eat between 200 to 400 grams of meat and fish.