Explanation:
The digestive system happens in the first stage. First, you bite into the food. Secondly, your front teeth tear food, and your back teeth crush and grind the food. Then, the tongue rolls the food back and the glands release Saliva, and the food turns into the bolus. Finally, you swallow the bolus passes the pharynx that’s in your throat, and goes down the esophagus. The first stage is where the digestive system happens.
The second stage of the digestive system takes place in the stomach. First, chemicals break down the bolus into nutrients. Next, the muscle of the stomach squeezes and relaxes. Then, the muscle actions mix up the bolus and chemicals. Finally, after four to six hours of squeezing and mixing the bolus turns into liquid. The digestive system happens in the stomach in the second stage.
The third stage of the digestive system happens in the small and large intestine. First, the pancreas adds juice that digests most of the food, and the liver adds bile that gets rid of fat. Secondly, the juices mix with the food until it’s broken into nutrients, the folds in the wall soak up the nutrients. The nutrients pass into tiny blood vessels in the fold then blood carries the nutrients to the cell. Finally, food goes through three parts the cecum, colon, rectum.
