q('#stomach#<div class="s" style="line-height: 1.5em">We would die without food. Everyone needs to ~eat~. Many things happen to the food you eat once you put it into your ~mouth~. Your body cannot use food when you first swallow it. The ~food~ must be changed. The process that changes food so that the ~body~ can use it is called digestion. There are ~three~ steps to digestion - mechanical digestion, chemical digestion, and absorption. The food is first broken into small pieces by the ~teeth~ and then by the movement of the stomach muscles. This is called ~mechanical~ digestion. When you put the food into your mouth, the teeth begin mechanical digestion by breaking up the food. The food is then mixed with ~saliva~. Saliva is a kind of water that comes into your mouth that helps you swallow the food. Saliva has special ~chemicals~ to help digestion.</div>#');
q('#saliva~stomach~intestine~digestion#<div class="s" style="line-height: 1.5em">Saliva will come into your mouth when you are ready to eat or when you just smell food or think about it. The breaking down of food by chemicals is called ~chemical~ digestion. When you swallow the food, it moves down a long ~tube~ called the esophagus. No digestion takes place in the ~esophagus~. The food is there only for a short time. The other end of the esophagus is connected to the ~stomach~. When food enters the stomach, the stomach ~muscles~ squeeze the food and move it around. The stomach also has special ~digestive~ chemicals called acids and enzymes that chemically digest the food.</div>#');
q('#saliva~stomach~intestine~digestion~absorb#<div class="s" style="line-height: 1.5em">It takes about four hours for the acids and enzymes to digest the food in the stomach. This kind of chemical digestion breaks the food down into ~pieces~ so small that you would need a powerful microscope to see them. Food is changed into a ~liquid~ form. From the ~stomach~ the digested food passes into a long, thin, coiled tube called the small intestine. This ~intestine~ is about 6 meters long. It is the most important digestive organ because the food from the small intestine is absorbed directly into the ~blood~ and travels all around the body. This process is called absorption.</div>#');
q('#saliva~stomach~intestine~digestion~absorb#<div class="s" style="line-height: 1.5em">After the food is ~digested~ and absorbed into the blood, there is still some left-over food that cannot be ~absorbed~.  This ~waste~, or unabsorbed food,  passes into the ~large~ intestine along with some water. It stays in the large intestine for about one day. It is broken down further in the large intestine, and then it passes out of the body through the ~anus~.</div>#');