Anatomy Essay

1830 WordsMay 7, 20128 Pages
The nervous System The nervous system is divided into two different systems. One of these systems is the central nervous system which consists of the spinal cord and the brain. The main function of the central nervous system is to get information from the body and send out instructions. This is because the brain sends messages through the spinal cord and the nerves. This is done by the nerve cells which are called neurones. The neurons have long fibres in order to send electrical impulses throughout the body. The Digestive System The digestive system major components are the mouth, salivary gland, oesophagus, liver, stomach , gall bladder, pancreas, duodenum, large intestine and the colon and rectum. They all have different functions within the digestive system. When you eat, you chew and whilst chewing the salivary gland produces saliva which mixes in with this food. This makes enzymes which include salivary amylase. These then start to break down the starch which are in the food which have just been consumed by the individual. The food is then swallowed and travels down the oesophagus into the stomach. The stomach is made up of muscle. It is composed of three different types of muscle. The layers of muscle work together with gastric juices in order to help break up the food. Gastric juices consist of gastric protease and hydrochloric acid. The product that is left after this process is called chyme. This can stay in the stomach for up to three hours. The next place the chyme travels to is the small intestine which consists of the duodenum and the ileum. When the food reaches the duodenum, the liver and pancreas and duodenum all work together to make juices and secretions which help to digest the proteins, carbohydrates, fats and lipids. Also the gale bladder creates bile which makes it easier to break down fats. Further down the small intestine

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