Digestive System

The digestive system is the set of organs which transform some(prenominal) we run into substances that can be used in the automobile system for energy, growth and repair. The digestive system consists of the upper and lower intellectual nourishment tract. The upper section of the digestive system consists of the oral cavity, teeth, tongue, salivary glands, pharynx and esophagus. The lower alimentary tract is composed of the hurt, intestines and the glands of the digestive system i.e. the liver, gall bladder and the pancreas. The glands of the digestive system atomic number 18 accessory organs because although food does not annihilate instantly through them, they help the process, breaking worst the toxins or attack digestion produces. There are four ramifications of digestion. The first stage takes distinguish in the mouth where the action of teeth and saliva shuffle in; chewing and fortuneially digesting the food so that it result pass more easily alon g the oesophagus. Saliva contains the enzyme amylase which acts on cooked starch. The clunk of food that leaves the mouth through the action swallowing is know as a bolus. The tongue pushes the bolus to the back of the mouth towards the pharynx, a tidy tube behind the mouth. The food passes into the pharynx and down to the oesophagus.

In the oesophagus the chewed food is carried from the pharynx to the stomach by a muscular contraction known as peristalsis. The line drive of the oesophagus secretes mucus to ease and lubricate the passage of food. The imprimatur stage of digestion takes place in the stomach. Food enters the stomach from the oesophagus via the cardiac sphincter , a valve that stops back flow of the stomac! hs contents, and leaves it through the pyloric sphincter into the duodenum, the first part of the microscopic intestine. In the stomach the gastric juices contains the enzymes, hydrochloric acid which neutralises bacterium and activates pepsin, and the pepsin whence acts on proteins. The third stage of digestion takes place in the diminutive intestine. Completion of the chemical...If you want to get a climb essay, instal it on our website: OrderEssay.net

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