The fantastic voyage of the digestive system Essay

The esophagus receives food from the mouth after swallowing and then delivers it to the stomach. The stomach holds food which it is being mixed with enzymes which continue the process of breaking down the food into a useable form. When the contents of the stomach are processed they are released into the small intestine. In the small intestine food is broken down by enzymes released from the pancreas and bile from the liver, the food is moved through and mixed with digestive secretions. The small intestine is made up of three segments the duodenum, jejunum and the ileum, the jejunum and the ileum are mainly responsible from the absorption of nutrients in to the bloodstream. These contents start out semi-solid and end in a liquid form after passing through the organ. Water, bile, enzymes and mucous change its consistency, one the nutrients have been absorbed it then moves onto the large intestine. The large intestine connects to the rectum and is specialised in processing water so that emptying the bowels is easy.

Digestion starts in mouth and it is going through several steps. Teeth which are a Mechanical digestion start tearing and crushing the food down into small pieces so that the food will smoothly run down our throat. The salivary glands are located underneath the back of our tongues and that’s what is creating our saliva. The saliva is the Chemical Digestion is helping soften the food in the mouth so it is easy to swallow. Also saliva is the first out of several chemicals that is breaking the food into smaller bits. The tongue is the muscle that works with the food and saliva to form something similar to balls that can be swallowed. Also tongue contains taste buds so that we know if the food is salt, sweet, sour or bitter. Esophangus is a simple transportation tube that is joining the throat with stomach. When swallowing we are closing a trap door in our throats called the epiglottis. By closing this trap we are preventing the food prom going to trachea and into our lungs. Also Food moves down the esophangus using muscles not gravity. Stomach is the first stop after the Esophangus. When the food gets into stomach the stomach uses chemicals to try to make the food smaller. These chemicals are called gastric juices and they include hydrochloric acid and enzymes. (Enzymes are

The digestive system of a pig is classified as monogastric or non-ruminant, which is having a stomach with only a single compartment, like humans. In addition, the digestive tract of the pig has five main parts, including the mouth, esophagus, stomach, and small and large intestines. Furthermore, the mechanical breakdown of the food begins upon the entrance of the mouth in the digestive tract. Basically, the food is grinded into smaller pieces by its teeth. Next, saliva is produced in the mouth, acting to moisten the small food particles, along with an enzyme that starts the digestion of the starch. Then, the food is pushed towards the esophagus with the help of the tongue. Primarily, the esophagus carries the food from the mouth to the stomach, being a tube, which is carried out with the help of a series of muscle contractions that push the food towards the stomach. Subsequently, after the first of the contractions, swallowing, has taken place, the cardiac valve, located at the end of the esophagus, prevents food from passing from the stomach back to the esophagus. Likewise, the stomach comes next in the digestive tract; it serves as a reaction chamber, adding chemicals to the food. Also, hydrochloric acid and enzymes help break down food into small particles of carbohydrates, protein, and fats. Additionally, some particles are absorbed into the bloodstream, from the stomach, while others cannot be absorbed by the stomach, being passed to the small intestine through the pyloric valve. Moreover, the small intestine aids

What are the three sections of the large intestine and what roles does each play in digestion or absorption?

Trace and discuss the complete movement of a bolus of food entering and exiting the human via the digestive system.

The stomach is a strong muscular sac that is the mixing bowl of the body where food will be mixed with gastric acid making a liquid called chyme. Stomach muscles will continue to contract making chyme that will move to the pyloric valve, which is at the top of the small intestine, known as the duodenum. While pepsin starts the digestion of proteins and lipids begin to break apart called gastric lipase. Also very small amounts of fat-soluble molecules are absorbed through the stomach

To discuss the regions of the digestive system, it seems more reasonable to start superiorly and work my way down. The digestive system as a whole can be broken down into two regions called the alimentary tract, and accessory organs (SEER, .n.d.) The Alimentary tract consists of the: mouth, pharynx, esophagus, stomach, small intestines, and large intestines. The accessory organs are there to aid the digestive system and are the: salivary glands, liver, gallbladder, and pancreas.

The digestive systems starts as food begins to enter the oral cavity through the mouth. As digestion continues the tongue plays an important role by pushing broken down food from the secretions during the chemical reaction of salivary glands releasing amylase from mouth to the oropharynx. The oropharynx reactions with epiglottis, which a flap that closes during digestion to make sure food does not enter windpipe. The glottis is the opening that goes to lungs, if food enters the oropharynx it would make the epiglottis fold back whenever the glottis is closed food is allowed to go into the esophagus. There are two sphincters of the esophagus, the upper and lower esophageal sphincters. The upper esophagus is concluded of a buddle of muscles who

The large,Hollow organs of the GI tract contain a layer of muscle that enables their walls to move. The movement of organ walls-called peristalsis-propels food an liquid through the GI tract and mixes the contents within each organ group. When a person swallows,Food is pushed into the esophagus,The muscular tube that cares food an liquids from the mouth to the stomach. The stomach then stores swallowed food or liquid,Mixes the food and liquid with digestive juice it produces,An then slowly empties it's contents,Called Chyme,Into the small intestine. The large intestine then absorbs water and any remaining nutrients an changes the waste from liquid to stool which is then pushed out through the

The Alimentary Canal is a system which contains different sections and organs that work together to digest substances. Food substances pass through the alimentary canal which starts at the mouth and eventually ends up at the anus. Ingestion is the consumption of a substance through the mouth e.g. eating or drinking. The mouth increases surface area for chemical digestion as Salivary glands produce Saliva which contains amylase to breakdown starch. Saliva also contains mineral salts to keep PH constant and Mucin to make food slimy and easier to pass down the oesophagus. Peristalsis is the movement of food by coordinated involuntary muscle contractions. Peristalsis is used in the oesophagus, stomach, and intestines to transport food.

The Stomach (Human Anatomy): Picture, Function, Definition, Conditions, and More. (n.d.). Retrieved October 19, 2015, from

Digestion begins with the process of mastication; food enters the mouth and the teeth begin to crush and grind the food into smaller pieces to form a bolus. Saliva is secreted from nearby salivary glands, which not only moistens food for easier swallowing, but also begins chemical digestion. Swallowing (deglutition) occurs next; at the beginning of a swallow the tongue voluntarily pushes the bolus upwards against the palate and backwards towards the pharynx. Involuntary reflexes are then initiated in order to prevent food from entering the respiratory tract; the uvula closes off the nasal cavity and the epiglottis covers the glottis and seals off the larynx. As the bolus approaches the esophagus the upper esophageal sphincter (UES) relaxes

The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract (GI tract). In the mouth is chemical digestion due to the enzymes in the saliva known as amylase (Manley, 83). Peristalsis occurs in the esophagus (phagus = eat) and all throughout the G.I. tract. The smooth muscle tissues contract pushing the food (bolus) down toward the stomach in rhythmic contractions. The epiglottis is a flap that has to close when we eat in order to prevent the food from entering the trachea. At times when we talk or laugh while we eat the epiglottis does not have time to close and we choke (Manley, 83).

When we pop a food into our mouth and chew with lower teeth performing all the motion, rising and falling at the rate of an inch a second. Gulp, and down the food goes, and now we rely on esophageal peristalsis, a 10 inch long organ of the digestive system that helps move food from the back of our throat to our stomach with a speed of ¾ inch per second. Once food has entered the esophagus, it doesn’t directly drop in our stomach in just a snap of a finger. Instead, the muscles in the walls of the esophagus move in a wavy way to slowly squeeze causing, the food flow in the esophagus, its speed. Splash — into the tummy. There, the food remains for an average of two to four

The oesophagus is a muscular tube that connects the throat also known as the pharynx, with the stomach. The oesophagus is approximately 8cm in length and is lined with a pink tissue called mucosa. The oesophagus runs behind the windpipe (also known as the trachea) and the heart, the oesophagus runs in front of the spine. The oesophagus before entering the stomach goes through the diaphragm.