...I was eating an cheeseburger and then something pop out of my mind. I wonder what happen to my cheeseburger that I just ate so I went home and seach it up. The process of mechanical digestion begins as you take your first bite of food. Your teeth carry out the first stage of mechanical digestion. Your center teeth, or incisors, cut the food into bite-sized pieces. On the either side of the incisors are sharp, pointy teeth called canines. These teeth tear and slash the food in your mouth into smaller pieces. Like mechanical digestion, chemical digestion begins in the mouth. If you take a bite of a cracker and roll it around your mouth, the crackers begins to taste sweet. It tastes sweet because a chemical in the saliva has broken down the starch in the cracker in to...
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...Colon-located under the pancreas and above the small instestine. Parotid Salivary Gland- Ascending Colon Descending Colon Stomach- is located next to the liver and under the diaphragm. Propulsion, chemical digestion, mechanical digestion, absorption Pharynx- is located behind the tongue Small Intestine-is located above the rectum and next to the appendix. Propulsion, chemical digestion, mechanical digestion, absorption Large Intestine-Propulsion, chemical digestion, absorption Anal Canal Liver-is located under the diaphragm and above the gall bladder. Rectum-is located under the small intestine Mouth-Propulsion, chemical digestion ,mechanical digestion Propulsion-the act of propelling. Once food is chewed and mixed with saliva, it is propelled down the esophagus. To propel is to move the food substance from one point to another point in the digestive process. Absorption-to take something in through the skin or intestine. When we eat, the food is absorbed through the cells and bloodstream . Mechanical digestion-aspect of digestion through mechanical mechanisms or movement. Mechanical digestions begins when we begin to chew our food, and continues as the food substance is moved from different parts of the body and digestion process. Chemical digestions-aspect of digestion achieved with the use of chemicals to our food. Induction of chemicals begin as soon as we begin to chew or food, and continue to be introduced as the food moves from the esophagus into the stomach...
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...as their functions Discuss neural control of the digestive system Compare and contrast mechanical and chemical digestion Discuss the effects of again and disease on the digestive system The GI tract is long tube that is open at both ends for the transit of food during processing Named portions of the tube include the esophagus, stomach, small intestine, large intestine, and rectum Accessory structures are not part of the GI tract, but they do contribute to food processing Accessory structures include the teeth, tongue, salivary glands, liver, gall bladder, and pancreas Digestive Processes There are 6 basic processes involved in digestion The Digestive System The GI tract, and accessory organs like the liver and pancreas, are responsible for facilitating the body’s metabolic processes. Catabolism: Larger molecules are broken into smaller molecules (mouth, stomach, duodenum). In the GI tract, this is called digestion and can occur by either mechanical or chemical means. Anabolism: Smaller molecules are used as building blocks for larger molecules (liver). The Digestive System Mechanical digestion includes all movements that facilitate catabolic processes: Mastication Swallowing Mixing Increase contact of food with digestive chemicals Peristalsis Movement of muscles within the GI tract that facilitates movement of food The Digestive System Chemical digestion is mainly accomplished by using water (and enzymes) to break chemical bonds (hydrolysis)...
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...Ileum 11. Cecum 12. Appendix 13. Sigmoid Flexure 14. Anus 15. Rectum 16. Sigmoid Colon 17. Descending Colon 18. Jejunum 19. Transverse Colon 20. Splenic Flexure of Transverse Colon 21. Spleen 22. Stomach 23. Esophagus 1. Parotid Gland 2. Sublingual Gland 3. Submandibular Gland 4. Liver 5. Gallbladder 6. Duodenum 7. Pancreas 8. Hepatic Flexure 9. Ascending Colon 10. Ileum 11. Cecum 12. Appendix 13. Sigmoid Flexure 14. Anus 15. Rectum 16. Sigmoid Colon 17. Descending Colon 18. Jejunum 19. Transverse Colon 20. Splenic Flexure of Transverse Colon 21. Spleen 22. Stomach 23. Esophagus The Digestive Pathway Mechanical Digestion begins in the mouth from the moment that a food bolus enters the oral cavity. Mastication, the mechanical breakdown of the food bolus by chewing occurs here. Chemical Digestion begins when the Salivary Glands (Parotid, Sublingual and Submandibular Glands) release saliva into the oral cavity. Saliva contains amylase, an enzyme that breaks down carbohydrates. After bolus has been broken down adequately, swallowing occurs. The food bolus will move through the pharynx and enter the esophagus continuing its journey via peristalsis (rhythmic contractions of the muscle layers) until it passes through the lower esophageal sphincter into the stomach. NOTE: The Esophagus is located posterior to the trachea. The Esophageal sphincter normally remains closed, preventing reflux of stomach contents. The stomach is divided into...
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...colon- Located on the opposite side of the Ascending colon, below the Transverse colon, beside the Small Intestine and above the Rectum. Rectum- Located below the Descending Colon and above the Appendix. Appendix- Located below the Rectum and above the Anal canal. Anal canal- Located below the Appendix. I will remember these by studying this document and the picture above. Part Three: Mouth- Propulsion, Chemical digestion, Mechanical digestion. Small Intestine- Propulsion, Absorption, Chemical digestion, Mechanical digestion. Esophagus- Propulsion. Stomach- Propulsion, Absorption, Chemical digestion, Mechanical digestion. Large Intestine- Propulsion, Absorption, Chemical digestion. Part Four: Propulsion is the process that moves food through the alimentary canal. This also includes swallowing and peristalsis. Absorption is the transport of end products from the GI tract to the blood or lymph. Substances must first enter the mucosal cells by active or passive transport processes. The small intestine is the major site of absorption. Chemical digestion...
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...Anatomy The alimentary canal, also known as the digestive tract, is the pathway by which food enters and is expelled from the body. It begins at the mouth, then follows to the pharynx, esophagus, stomach, small intestine, large intestine, and ends at the anus. The main structures of the mouth, or oral cavity, are the teeth, tongue, and palate. The teeth tear and grind food down so that it is small enough to proceed through digestion, this is called bolus. The tongue is a large and powerful muscle that helps mix food, and houses sensory receptors for taste. The lingual frenulum is a fold of mucosa that secures the tongue to the floor of the mouth. Lastly, the palate separates the oral cavity from the nasal cavity, allowing separate passages for air and food. The mouths moist environment, provided by mucous membranes and salivary glands, aid in softening food and facilitate swallowing. The pharynx, commonly called the throat, has three main sections. The first section is the nasopharynx, which makes up the back of the nasal cavity. It connects to the second region, the oropharynx, by a passage called the isthmus. The oropharynx begins at the back of the mouth and continues down to the epiglottis, a flap of tissue that covers the air passage to the lungs and directs food to the esophagus. The third region, the laryngopharynx, which begins at the epiglottis and leads to the esophagus, regulates the passage of air and food. The next stop is the esophagus, which can expand or...
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...Nutrition Health and Wellness Beverly Blackwood May 8, 2015 The Digestive System Parotid salivary gland Pharynx Esophagus Liver Stomach Gall bladder Pancreas Transverse colon Descending colon Small intestine Ascending colon Appendix Rectum Anal canal Location of the parts of digestive system Parotid salivary gland: There are two parotid glands, one on each side of the face. They are located in front of the ears and extend to the lower borders of the jawbones. Pharynx: The tube begins at the base of the skull and ends inferior to the cricoid cartilage. Esophagus: Is a muscular tube that runs behind the windpipe (trachea) and heart, and in front of the spine, which connects the throat with the stomach. Liver: Located in the upper-right portion of the abdominal cavity under the diaphragm. Stomach: The stomach is located in the upper-left area of the abdomen below the liver and next to the spleen. Gall bladder: located under the liver and on the right side of the abdomen. Pancreas: about 6 inches long and sits across the back of the abdomen and, behind the stomach. Transverse colon: crosses the abdomen from the ascending colon at the hepatic or right colic flexure with a downward convexity to the descending colon. Descending colon: is located on the left side of the large intestine, extending from the bend below the spleen to the sigmoid colon. Small intestine: Is continuous tubing running from the stomach to the anus. Ascending colon:...
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...teeth begins to breakdown the food particles and mixes with the saliva. From the mixture of food and saliva travels to the stomach. The stomach begins to secrete gastric enzymes that combine with the food. As the food continues through the duodenum The stomach receives the food particles and begin to mix with the gastric juices to further breakdown the food. The liver The gallbladder Duodenum Jejenum Ascending Colon A. 3. Summarization of mechanical and chemical digestion Mechanical Digestion - Food is crushed and liquefied by the teeth, tongue, and peristaltic contractions (waves of involuntary muscle contraction) of the stomach and small intestine. This creates a greater surface area for the digestive enzymes to work upon. Chemical Digestion - Many glandular structures, dispersed throughout the body, are involved in breaking food into simple molecules that can be absorbed. In the mouth, the salivary glands produce saliva, which both lubricates food and begins the process of starch digestion. Saliva contains salivary amylase (ptyalin), an enzyme that digests starch to maltose (a disaccharide). As food leaves the mouth, the esophagus conducts it to the stomach via the cardiac sphincter by means of peristaltic waves of smooth muscle contraction. A. 4. Examples of enzymes that digest carbohydrates, proteins, and lipids Amylase break down carbohydrates. Sucrase break down carbohydrates. Mycozyme break down carbohydrates. Protease break down...
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...iLab week 1 Essay SCI 228 Nutrition, Health, and Wellness iLab Week 1 Essay There are 14 parts of the digestive system. They include the salivary glands, tongue, pharynx, esophagus, stomach, liver, pancreas, gall bladder, small intestine, large intestine, appendix, rectum, and the anus. Food we eat first enters our mouth, which is where you find the tongue. We know it’s in there because it tastes the food we put in our mouth. You will find the salivary glands in 2 spots, under your tongue and behind your tongue. The best way to remember that it’s located there is to known that it releases saliva and there is always saliva on your tongue. Our pharynx is found in the back of the mouth. To remember it is located there I use the first half of the word which sounds like far, and then use that as a saying. The Pharynx is the start of a far travel. This is down the esophagus. The esophagus starts at the back of your mouth and runs down into your stomach. I remember it’s located there because I feel food go down my esophagus when I touch my neck. Our stomach is located underneath our heart. Most people love food. I use that to remember where our food goes after we swallow, under the heart into the stomach. The pancreas is located behind the stomach. It’s located behind the stomach because it needs to use the blood streams coming out of the heart to add enzymes it made. After the stomach, food will go into the small intestine. The best way to remember that the small intestine...
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...What specifically is the role of an enzyme in digestion? Enzymes are working proteins that facilitate chemical reactions without being changed in the process. Organs of the digestive system excrete digestive juices, which contain enzymes that break the bonds of nutrients that can be absorbed. 2. Trace the path of a cheeseburger and fries through the digestive tract. Indicate each place where mechanical digestion, chemical digestion, and absorption occurs FOR EACH NUTRIENT (carbohydrates, lipids, proteins). Be sure to fully explain the role of EACH organ involved (including the pancreas, liver, and gallbladder). In the mouth – food is crushed and chewed by teeth (mechanical digestion) and moistened with saliva. The carbohydrate-digesting enzyme of saliva begins to break down the starch (chemical digestion) of the hamburger buns and fries to sugars. When swallowing, the tongue forces the food mass into the back of the mouth and the food moves through the esophagus to the stomach by peristalsis. In the stomach – Food collects in the upper area of stomach where is it mixed and mashed (mechanical digestion) and starch continues to be digested until cells in the stomach release a strong acid mixture of gastric juice, water, HCl and enzymes to initiate protein digestion from bread and meat (chemical digestion), creating chyme. Peristalsis also aids in moving the chyme from the stomach to the small intestine (mechanical digestion). Fat follows quickly behind. In the small intestine...
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...of the word transfer, after that is the descending colon. The appendix is right next to the ascending colon which I will remember by them both starting with the letter A. And of course following the descending colon is the rectum and anal canal. I will always remember the small intestine is in the middle of the large intestine and where the others are by the following screen shot I included below. Part 3 Digestive system parts and the mechanism that occurs in that digestive system part: Mouth: propulsion, chemical and mechanical digestion Small Intestine: propulsion, absorption, chemical and mechanical digestion Esophagus: propulsion Stomach: propulsion, absorption, chemical and mechanical digestion...
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...found on the right side of the body. Small intestine: located under the stomach. Ascending colon: located alongside of the small intestine. Appendix: located between the small and large intestine on the right side of the body. Rectum: sits near the end of the large intestine and above the anal canal and anus. Anal canal: located at the end of the large intestine. PART 3 PART 4 Propulsion Absorption is a term used to describe how nutrients are taken into the body and how food that isn’t digested passes through the body. The process of absorption often takes place in our small intestine. Chemical digestion the process of breaking down the food we eat is either chemical or mechanical digestion. Chemical digestion starts in the mouth and is how the food we eat is broken down by with the acids and enzymes. Mechanical digestion the process used to break down food that begins as soon as we start chewing. In doing this the food is broken down in small enough pieces to digest. Reference: Pruitt, S. T. B., &Stein, J. J., &Cummings, B., &Blake, J. S., &Thompson, J., &Mel. Nutrition, Health, and Wellness An Applied Approach VitalSource eBook For...
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...Week 1 Assignment Part 1 http://www.e-missions.net/cybersurgeons/?/dig_teacher/ Part 2 http://www.lessontutor.com/jm_digestive.html # | Name | Description and Function | | | | 1 | teeth | The strongest stuff in the body! Their purpose is to rip, grind, mash and generally pulverize all that food we put into our mouths. Why? So that it fits down our throats. | | | | 2 | epiglottis | This trap door belongs to both the respiratory system and the digestive systems. Swallowing triggers its closing over the trachea to prevent food and fluids from draining into our lungs. | | | | 3 | liver | One of the 'accessory' organs of digestion. Food doesn't actually pass through this organ. Instead, this organ secretes bile that is passed along to the gall bladder for concentration and storage. | | | | 4 | gall bladder | Another accessory organ. Food doesn't touch this one, either. It is a pear-shaped sac about 4 inches long and is the reservoir, or storage tank, for bile. Concentrated bile is released into the duodenum as needed to break down fats into an absorbable form. | | | | 5 | common bile duct | As close to a transport highway as we've visited so far. This duct collects donations from the liver and the gall bladder (bile) as it passes along to the duodenum of the small bowel. To see an xray view - click on the picture on this page. | | | | 6 | large bowel | Is it poop yet? (We'll call it 'feces' [sounds like 'fee-cees'] or 'stool'...
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...digestive tract, also known as the gastrointestinal (GI) tract, consists of a long, twisting tube that reaches from the mouth to the anus.” It includes several organs: the mouth, pharynx, esophagus, stomach, small intestine, and large intestine (National Institute of Health). There are also other major accessory organs included in the digestion process which are: the salivary glands, liver, gallbladder, and the pancreas. These organs secrete fluids needed during the digestive process (National Institute of Health). Food undergoes three processes while in the digestive system: Digestion, Absorption, and Elimination. Digestion is an intricate process where the food that is ingested is turned into nutrients, which the body uses for energy, growth and cell repair (WebMD). There are two types of digestion: mechanical digestion and chemical digestion. Mechanical digestion involves the breakdown of larger food portions and is acted upon by thousands of enzymes. This digestion begins with the mouth and continues in the stomach (National Institute of Health). The second type of digestion is chemical. According to the National Institute of Health, “chemical digestion uses water and digestive enzymes to break down complex molecules through a process called hydrolysis.” Absorption occurs mainly in the small intestine after being passed through from the stomach. The small intestine is made up of three parts – the duodenum, the jejunum, and the ileum – and this is...
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...Digestive and Respiratory System Worksheet Name: Before answering the questions below, log in to ADAM and view the clinical animations for Peristalsis and Gas Exchange. Remember, you may use our text, our discussions, and the internet to write your answers, but be sure to write your answers in your own words and to use correct citations where appropriate! Cutting and Pasting your responses will result in a Zero for this assignment! 1. Trace the path of an oxygen molecule from the air outside you to your tissues. Nose --> Mouth --> Pharynx --> Larynx --> Trachea --> (LUNGS: Bronchus --> Bronchioles --> Alveoli), then back out. Air enters the body through the nose and then moves into spaces called the nasal cavities. (Hair and cilia trap dust and debris and Air is warmed and moistened) Some of the cells lining the nasal cavities produce mucus. This sticky material moistens the air and keeps the lining from drying out. Mucus also traps particles such as dust. The cells that line the nasal cavities have cilia, tiny hair like extensions that can move together in a sweeping motion. Next, air enters the pharynx. The pharynx opens to two different passages. One is connected to the esophagus, wherein food and fluids are directed and the other is linked to the trachea where the air is passed through to the lungs. From the pharynx, air enters into the larynx (the voice box). The larynx is part of the upper respiratory tract that has two main functions: a passageway...
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