Preview

SCI/241: A Brief Note On The Human Digestion System

Satisfactory Essays
Open Document
Open Document
256 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
SCI/241: A Brief Note On The Human Digestion System
Human Digestion
Christine Wilkes
SCI 241
Natalia Woehl
March 8, 2011

The human digestion system consists of a series of organs and glads that process the food that we eat. The digestion process starts when food enters the mouth, then with the chewing of food. The salivary glads help break down the food with enzymes so that it is easier to swallow. While the food is being chewed it is turned into bolos, which then travels down the pharynx and through the esophagus. The esophagus is the long tube that runs from the mouth to the stomach. After the food reaches the stomach it is partially digested and mixed with the stomach acids called chyme. Food normally takes between two and six hours to digest depending on what is eaten and the

You May Also Find These Documents Helpful

  • Good Essays

    The beginning of the digestive process starts with the smell and sight of food which activate the salivary glands. The mouth is the point at which food enters the digestive tract and continues the digestive process by chewing food. The food is then broken down into pieces and moistened by salivary glands which turn food into a bolus. The bolus goes down the pharynx into the esophagus which connects the pharynx to the stomach. The stomach is an organ that mixes food and secretes gastric juice. The bolus, once in the stomach, is mixed into a semiliquid mass called chime. The stomach is close together with the liver and pancreas but does not get assistance from these organs. The chime then enters…

    • 251 Words
    • 2 Pages
    Good Essays
  • Good Essays

    When a human sees or smells food the salivary glands are the first thing to react in the digestive system. Once the food is placed into the mouth, it is then taken over by the teeth, tongue, and saliva. These three are what help make the food moist and small enough to be swallowed. At this point the food then becomes what is called bolus. The bolus is then traveled through the pharynx then esophagus, and into the stomach. When the food travels through the pharynx, the epiglottis makes sure that the food paces by the without interring the lungs. Once the bolus enters the stomach, it is then broken down even further by the acids within the stomach. The bolus becomes a little more digested before leaving the stomach. Once the food is at this stage, it is then called Chyme. Chyme is a semiliquid food. It normally leaves the stomach within two to six hours. The small intestine is what does most of the digesting and takes the nutrients from the food. It has help from the liver, pancreas, and gallbladder. The small intestine is made up of three parts, these parts are called, the jejunum, the ileum, and the duodenum. Anything that is not taken for nutrients in the small intestine goes to the large intestine. At this time it travels through what is called the sphincter. The sphincter prevents any of the food to go back into the small…

    • 483 Words
    • 2 Pages
    Good Essays
  • Better Essays

    Unit 4 Assigment

    • 1938 Words
    • 8 Pages

    The gastrointestinal tract starts with the mouth, which leads to the gullet via the stomach, small intestine, large intestine, and ends at the anus. In due course of the journey, the ingested food is broken down by both physical and chemical means to release nutrients which are absorbed into the blood stream. The ingested food is physically broken down in the mouth by chewing so as to reduce its size for increased surface area over which enzymatic reaction will take place. Enzymatic reaction is known as digestion and this is defined as the chemical breakdown of the ingested complex food molecules by the action of biological enzymes, into simplest form that can be absorbed into the blood stream and assimilated into living cells. In human beings, various components of the ingested food are digested and absorbed at various sections of the alimentary canal .…

    • 1938 Words
    • 8 Pages
    Better Essays
  • Good Essays

    It does not really take long for the food we eat to go through the digestive system considering…

    • 689 Words
    • 3 Pages
    Good Essays
  • Good Essays

    The digestive system is the physical ad chemical breakdown of food. Following ingestion, food and fluids are processed by the digestive organs so that nutrients can be absorbed from the intestines and circulated around the body. Any residue of food that is not digested is solidified and eliminated from the body in the form of feces. (P.207)…

    • 420 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    The digestive system functions in a way which is firstly ingestion (in taking food), digestion (breaking down the food), absorption (extracting the nutrients from food) and finally defection (waste of food).…

    • 1619 Words
    • 7 Pages
    Powerful Essays
  • Satisfactory Essays

    The digestive system functions in a way which is firstly ingestion (in taking food), digestion (breaking down the food), absorption (extracting the nutrients from food) and finally defection (waste of food).…

    • 401 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Captain Picard and his submarine has just been shrunk and placed in a glass of root beer soda…

    • 329 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    Digestion is a chemical process whereby food substances are broken down into soluble unit and absorbed in the blood stream by a process known as assimilation. The digestive system is made of different tract as seen in figure 1.2. All these parts help in the digestion of food.…

    • 1855 Words
    • 8 Pages
    Powerful Essays
  • Good Essays

    3

    • 1178 Words
    • 4 Pages

    The digestive system works like an assembly line in reverse. Carbohydrates, fats and proteins are progressively broken down into smaller molecules that can be used by the body. This system extracts needed nutrients and gets rid of any unnecessary wastes. Structurally, the digestive system consists of the long tube, the gastrointestinal (GI) tract that serves as the direct pathway for what you eat and excrete. Along the way, various accessory organs help with the mechanical breakdown and the chemical digestion of food. Mechanical digestion involves physically mashing or tearing the bites of food we put in our mouths. We normally think of mechanical digestion occurring in the mouth, but there are other features of your GI tract that also help mash up your food. As what you consume is being smashed, chemical digestion also begins. Enzymes break fats, carbohydrates and proteins into their building blocks so they can be used by the body. Once these molecules are broken down, they can become the raw material for the production of the body’s energy currency, adenosine triphosphate (ATP).…

    • 1178 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    The Digestive System

    • 622 Words
    • 3 Pages

    Exercise 8: Chemical and Physical Processes of Digestion: Activity 1: Assessing Starch Digestion by Salivary Amylase Lab Report Pre-lab Quiz Results You scored 100% by answering 6 out of 6 questions correctly. 1. The substrate for amylase is You correctly answered: e. starch and carbohydrate. 2. Which of the following is true of enzymes? You correctly answered: c. Their activity can be affected by temperature and pH. 3. The reagent IKI tests for the presence of You correctly answered: a. starch. 4. Which of the following is not true of controls? You correctly answered: d. A negative result with a positive control is required to validate the test 5. Which of the following is an end product of starch digestion? You correctly answered: e. maltose and glucose 6. Hydrolases are enzymes that break down large molecules into smaller subunits through the addition of _____________. You correctly answered: b. water…

    • 622 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    bio short essay

    • 471 Words
    • 2 Pages

    Once I have taken a bite out of my delicious favorite meal, the digestive system gets to work. It all begins in the mouth, chewing the food small enough to swallow. Salvia is squirted into the food to moisten and soften the food. Salvia contains enzymes, which break down the starches in food. Once the tongue forms the food into a ball to be swallowed, it is sent down the pharynx. The pharynx contains sphincters that help keep your food down once you swallow. Next, it makes its way to the esophagus, which is simply a transportation tube from the mouth to the stomach. It then reaches the stomach, which uses chemicals to make the food particles tinier. These chemicals are called gastric juices and include hydrochloric acid and enzymes. Once the stomach mixes with the chemicals, it is formed into a cream-like liquid called chyme. The gallbladder takes over from here hitting the food with more chemicals, one of them called bile. Bile is mixed with our food breaking down the fat into droplets, which will supply us with energy later on. From there, the pancreas uses digestive juice to break down…

    • 471 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    Essay On Digestive System

    • 552 Words
    • 3 Pages

    The process of digestion has many stages with the first starting in the oral cavity. Within the system, food passes through a tube called the alimentary canal, more commonly known as the gastrointestinal tract. The tract is made up of the oral cavity, pharynx, oesophagus, stomach, small intestines, and large intestines. To provide energy and nutrients to the body, major functions take place in the digestive system which include; ingestion, secretion, mixing and movement, digestion, absorption and excretion.…

    • 552 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    The digestive system

    • 5068 Words
    • 21 Pages

    The principal structure of the digestive system is an irregular tube, open at both ends, called the alimentary (al-i-MEN-tar-ee) canal or the gastrointestinal (GI) tract.…

    • 5068 Words
    • 21 Pages
    Powerful Essays
  • Good Essays

    Fantastic Voyage Unit 9

    • 1364 Words
    • 6 Pages

    Digestion begins in the mouth. A brain reflex triggers the flow of saliva when we see or even think of food. Saliva moistens the food while the teeth chew it up and make it easier to swallow. Amylase, which is the digestive enzyme, found in saliva, starts to break down starch into simpler sugars before the food even leave the mouth. The nervous pathway involved in salivary excretion requires stimulation of receptors in the mouth, sensory impulses to the brain stem and parasympathetic impulses to salivary glands. Swallowing his food happens when the muscles in his tongue and mouth move the food into his pharynx. The pharynx, which is the passage way for food and air, a small flap of skin called the epiglottis closes over the pharynx to prevent food from entering the trachea and causing choking. For swallowing to happen correctly a combination of 25 muscles must all work together at the same time. After being chewed and swallowed the food enters the esophagus or gullet is the muscular tube in vertebrates through which ingested food passes from the throat to the stomach. It connects the pharynx, which is the body cavity that is common to both the digestive and respiratory systems behind the mouth, with the stomach, where the second stage of digestion is initiated. The esophagus is a long tube that runs from the mouth to the stomach. It uses rhythmic wave like muscle movements called peristalsis to force food from the throat into the…

    • 1364 Words
    • 6 Pages
    Good Essays

Related Topics