When in the mouth, the alkaline-conditioned food is digested by ptyalin. Once inside the stomach, with the acidic pH atmosphere, the digestive process is aided by pepsin.
From the stomach, food moves into the small intestine. Here, amylase, protease, and lipase are taking the role. The enzymes are under the control of the nervous system but can work independently and digest different types of food simultaneously.
Apart from the small intestine, the leftover food is removed into the large intestine as a stool.
Besides a sure groove, your digestive system also has a work schedule that can't be contested. There're three cycles of digestion that works continuously.
The first cycle, between the hours of 12:00 to 20:00, is a moment of the digestive organs to work actively. In other words, it's time to eat solid food.
The second cycle occurs during the hours of rest at 20:00 to 04:00. This cycle is often referred as the absorption. At that time, the body absorbs and distributes nutrients. That's why, someone who used to eat in the evening becoming fat fast because the absorption of food is being increased.
The third cycle, between the hours of 04:00 to 12:00, is the discharge. Body removes food excess. At this stage, a lot of energy is used, so you'd not eat heavy and solid foods because it can reduce the intensity of metabolic waste disposal, slow the digestive process, and use the energy wastefully.
You may also like:
The Body Book
The Antianxiety Food Solution
Williams' Basic Nutrition and Diet Therapy
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