More saliva is produced in order to begin the procedure of breaking down food so that the body can absorb it. The pharynx receives the food from the mouth and swallowing is done here. Swallowing is partly a reflex and partly voluntary control, but the structure of the mouth is highly involved. The tongue and the soft palate push the food into the pharynx, closing off the trachea, allowing the food to enter the oesophagus. The oesophagus extends from the pharynx and behind the trachea to the stomach.
The mouth is where the digestion starts and it is adapted to receive food by ingestion. This is a voluntary act where food is placed in the mouth to be swallowed. 2) This is then followed by propulsion. This is where food moves along the alimentary canal. This includes swallowing and peristalsis which is involuntary.
Food passes through a long tube inside the body known as the alimentary canal or the gastro intestinal tract (G I tract). The alimentary canal is made up of the oral cavity, the pharynx, the oesophagus, stomach, small intestine, and large intestines. In addition to the alimentary canal there are several important accessory organs that helps the body digest food but do not have food pass through them. Accessory organs include teeth, tongue, salivary glands, liver, gall bladder, and the pancreas. The first function of the digestive system is the intake of food; the mouth is responsible for this as this is where food enters the body.
Air enters the respiratory system through the nostrils (external nares) where the air is being filtrated, warmed, and humidified. Air is then passed through the pharynx which is also called the throat. It also shares its chamber with the esophagus. From the throat, it passes through an open glottis allowing the air to enter the larynx (voice box) within the larynx, you have an elastic mechanism called the epiglottis that protects the trachea from food and liquid entering the respiratory tract. Air leaving the larynx passes into the trachea.
Ulcerative colitis to a greater extent of cancer but both Ulcerative colitis and Crohn's disease are a type of cancer. When food is swallowed it goes through the feeding tube which is also known as the esophagus. Food then passes through the stomach to where it is then digested. Digested food leaves the stomach and goes to the small intestine. The small intestine digests most nutrients and the nutrients are absorbed into the body.
The small intestine leads to the large intestine, another tube for which absorption takes place. In the large intestine fluid is reabsorbed back into the bloodstream and faeces is formed; the faeces exits through the anus. Although these are the main organs involved in digestion, they are supported by the accessory organs. These include; the liver, gallbladder, pancreas, and salivary glands. Figure 1 (below) shows the location of these organs (madders.s, 2007).
In the body there are two main body systems one being the circulatory system and the other being the digestive system. The digestive system has four main stages these are ingestion, digestion, absorption and elimination. Ingestion starts at the mouth where the food enters the mouth and is chewed using the teeth in the mouth. The salivary glands in the mouth produce saliva which also helps to break food down and makes it easier to swallow. Once the food has been swallowed is goes down the oesophagus where the involuntary muscle movements help push the food to the stomach.
Non-striated- There is non striated muscle in the stomach, it helps the digestive system in the process of digestion of food by causing mechanical digestion due to churning action as muscles contract. It causes voluntary movement particularly during hunger or even when vomiting etc. Columnar Epithelium- Epithelium are protection cells, in the stomach and digestive tract it provides an impermeable barrier against any bacteria that could be ingested but is permeable to any necessary ions. Its especially important in the colon. The pH of the stomach is 1-2 this is strongly acid.
Fantastic Voyage Desire Fleming HS130, Section 03 Unit 9 Assignment Kaplan University 6/13/2014 Fantastic Voyage This essay will discuss the travels of a hamburger, french fries, and a root beer through the gastrointestinal tract of a 55 year old man. There will be a lot of sights to explore along the way. A description of the entire digestive process will take place. After the description, the voyage will continue on through the distal ilium through the mucosal membrane. Then travels will resume in the bloodstream via the superior mesenteric vein.
Blood glucose levels drop again after eating and the Lateral hypothalamus is activated (which initiates feeding) and we become hungry and the process starts again. There are several neurotransmitters in the body which are also involved in eating regulation. Ghrelin is a hormone which is released when the stomach is empty so it triggers eating. The second most important hormone is leptin and this is released from adipocytes, and the more fat a person has the more leptin is released and it acts as a satiety signal so stops food intake. Cummings et al (2004) did a study into the effects of ghrelin on people.