When these two senses react to food the salivary glands begin their work by creating saliva. Saliva is created for mouth lubrication and to help soften the food to slide through the esophagus. When the food enters the mouth, the tongue moistens it with saliva and moves it around. Therefore, the teeth can break down the food. This process converts the food into bolus.
The first major muscle movement occurs when food or liquid is swallowed. Although you are able to start swallowing by choice, once the swallow begins, it becomes involuntary and proceeds under the control of the nerves. Swallowed food is pushed into the oesophagus, which connects the throat above with the stomach below. At the junction of the oesophagus and stomach, there is a ring like muscle, called the lower oesophageal sphincter, closing the passage between the two organs. As food
The digestive system is where food is turned into energy for the body to survive and it packages the residue for the waste disposal. When you first take a bite of the ham sandwich it is taken into the mouth, this process is called ingestion, where it is mixed with saliva then chewed or masticated by the teeth and tongue that roll it into a bolus and this motion is also known as mechanical digestion. The saliva that the sandwich is mixed with initially contains an enzyme called salivary amylase that starts the breakdown of carbohydrates so that your body can absorb them which is known as absorption. The food then passes own the oesophagus to the stomach. The oesophagus is a tube of muscles that contract to push the bolus down towards the stomach and this action is called peristalsis.
A2: 1. Mouth: The mouth starts mechanical digestion with the chewing that takes places there but also mixes amylase that is secreted from the salivary glands in with what is being chewed to start chemical digestion. (2) 2. Esophagus: The esophagus transfers food from the mouth to the stomach. (2) 3.
The saliva which is contained in the mouth which is produces by the salivary glands begins to digest the food before the food is even swallowed. Saliva and the other chemicals which are produced along the way help speed up the digestive process which is called digestive enzymes. The mouth which is also known as the oral cavity is a specialized organ which receives food and breaks it into smaller pieces. The mouth is changed mechanically when biting and chewing food. In a humans mouth there are teeth and within a human they are four types of teeth which are used for different functions such as the incisor teeth are for biting and are found are the front of the mouth.
The small intestine comprises of the duodenum, jejunum and the ileum. Most if not all nutrients are absorbed in the stomach and small intestine. The remaining water and waste products then pass into the large intestine from where it leaves the body through the anus. The movement of food through the main digestive tubes is maintained by a series of muscular
HSC 3050 Prepare for and carry out extended feeding techniques. 1.1 Explain the anatomy and physiology of the gastro-intestinal tract in relation to extended feeding. Anatomy and Physiology Digestion of food begins in the mouth where food is chewed and softened by saliva to break down into pieces small enough for you to swallow. Food is then pushed down into the esophagus, a muscular tube that carries food to the stomach where it is digested. From the stomach, food travels to the small intestines, where digestion continues and nutrients are absorbed into the bloodstream.
When food enters our mouth it is moistened by saliva, salivary glands begin the digestive process from the sight and smell of food. The tongue aids in digestion by moving food around the mouth so it can be chewed property to break food down. The small intestine is 20 feet and takes 3 – 5 hours to digest food, it is dived into three sections, the duodenum, the jejunum and the ileum. It is responsible for absorbing most of the nutrients we eat in food. The small intestine breaks down most of the protein, fat, and carbohydrates we eat.
The Digestive System The digestive system is comprised of the alimentary canal and the accessory digestive organs, the digestive system breaks down food into soluble particles small enough to pass into body cells to be used for energy, growth and repair. Various chemical processes take place during digestion which enables absorption of nutrients and elimination of waste by egestion (process of eliminating undigested food from the body); the digestive process can take several hours and involves many different organs. The alimentary canal consists of the following parts: Mouth, pharynx, oesophagus, stomach, small intestine, large intestine, rectum and anal canal. The alimentary canal and the accessory digestive organs are supplied by two types of nerves, extrinsic (outside) nerves from the unconscious part of the brain or spinal cord and intrinsic (inside) nerves. Extrinsic nerves release the chemicals acetylcholine and adrenaline.
Excretory System Parts and their Functions The Liver-The liver detoxifies and breaks down chemicals, poisons and other toxins that enter the body. For example, the liver transforms ammonia (which is poisonous) into urea (which is then filtered by the kidney into urine). The liver also produces bile, and the body uses bile to breakdown fats into usable fats and unusable waste. Bile-After bile is produced in the liver, it is stored in the gall bladder. It is then secreted within the small intestine where it helps to break down ethanol, fats and other acidic wastes including ammonia, into harmless substances.