But just because you have a gym membership that you actually use doesnât mean you canât also have a few things at home for doing other types of workouts that you donât have time for at the gym, or for those days that you just canât make it out the front door.
The inside wall of the small intestine needs to be thin, with a really big surface area. This allows absorption to happen quickly and efficiently. If the small intestine had a thick wall and a small surface area, a lot of digested food might pass out of the body before it had a chance to be absorbed.
Since most all nutrients that a human needs are absorbed via the digestive system. All carbohydrates, proteins, and fats are absorbed in the small intestine.    Thin â¦ gs are absorbed throughout the entire system, with the exception of the esophagus. Some glucose, for example, can be absorbed in the mouth. Water, alcohol, and some nutrients are absorbed in the stomach. Most nutrient absorption occurs in the small intestine. Water and some minerals and vitamins are absorbed in the colon. Most vitamin K is produced by bacteria in the colon and absorbed there. 33 people found this useful. 1  The Five Major Parts of the Brain At its most basic, the brain controls the body.