In people with FMD, the dysplasia involves the walls of one or more arteries in the body. Areas of narrowing, called stenosis, may occur as a result of abnormal cell development. If enough narrowing causes a decrease in blood flow through the artery, symptoms may result.
  Digestion begins in the mouth. Mechanical digestion begins with the chewing of food. Chemical digestion also begins in the mouth with the enzymes been produced and used â¦ to break down the food. 4 people found this useful.he main parts of the digestive system are the mouth, esophagus, stomach, small intestine, large intestine, liver, gull bladder, and pancreas. Food does not actually pass thro â¦ ugh the liver, gull bladder and pancreas, but they do produce a green liquid called bile that helps digestion.
We're going to use you as the basis for our explanation of the digestive system. Let's start with eating. You get hungry and you eat. Once you put the food in your mouth, you start to chew and begin a process of mechanical digestion that grinds food down into a pulp. Your body also starts to release enzymes that start the process of chemical digestion and the breakdown of biological molecules. Most chemical digestion happens in the stomach.