My favourite food is pizza. First saliva starts to water in the mouth. Then when you put a bite of pizza into your mouth, it gets chewed and grinned by the teeth and turns mushy and easy to swallow. When the food is ready to swallow, the tongue rolls it up into a small ball of food called bolus which is then pushed to the opening of the esophagus which is the next part of the digestive system. The esophagus is like a stretchy pipe that is around 25 cm long which moves food from the back throat to the stomach. But there’s also another tube called windpipe which allows the air you breath in to reach your lungs, around the same area as the esophagus. There is a special flap call epiglottis that covers the wind pipe when food comes down to ensure that food enters the esophagus not the windpipe. There are muscles in the esophagus that slowly squeeze the food down to the stomach.

The stomach which is attach to the end of the esophagus is a large stretchy sack that has a shape like letter J. The bolus is then mixed with gastric juices and stomach acid which further breaks down the pizza and killing any bacteria that is in it. The food that comes out of the stomach and into the small intestine is called chime. The small intestine is packed beneath your stomach. The small intestine breaks down the chime even more so that the body can absorb its nutrients. Small intestine helps extract fat and proteins with the help from the pancreas, liver and gallbladder.

Those organs gives out different juices that help absorb fats and protein. The pancreas releases enzyme that helps in the digestion of carbohydrates, fats and proteins. The liver creates a substance call bile which helps absorb fats into the blood stream and the gall bladder stores bile for the body’s use. After a long time in the small intestine, the pizza has now been absorbed of all its nutrients. Then it goes on to the liver to be filtered out.

What’s filtered out goes to the large intestine where it will be passed out. Before it gets passed out, it goes through a place called colon. There the body gets its last chance to absorb the nutrients and water. After that as it moves along it gets harder and harder until it becomes solid. After it becomes solid, it gets passed out as faeces or poop.