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Human digestive system

Physiology of digestive system

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Liver is present inferior to the diaphragm and superior to the small intestine. It is triangular in shape and second largest organ in the human body.

It aids in the process of digestion by the production of bile and hence its secretion into the small intestine. Lying posterior to the liver is the gallbladder. It helps in storing excess bile from small intestine for reuse. It is located at the inferior side and posterior to the stomach having head and tail portion. The head is connected to the duodenum whereas the tail points to the left of the abdominal cavity.

The function of pancreas is to secrete digestive enzymes that helps in the digestion of food. It is the first step in the process of digestion. The food is ingested in the body through the mouth.

Food is also stored for specific time in the stomach before the actual process of digestion takes place. There are number of secretions that take place in the digestive system. Saliva, mucus, HCl, enzymes, and bile. Saliva perform the work of moistening the food. Also it contains digestive enzyme named salivary amylase that beings the digestion of carbohydrates.

Mucus helps to keep the entire passage of digestive tract moist and also forms a protective barrier. HCl forms acidic environment in the stomach and hence protect body from bacteria.

Bile breaks down lipids into smaller globules. The function of rest of the enzymes in the process of digestion are listed below:. If you are finding it tough to complete your homework on digestive system, allow tutors of urgenthomework. We charge very nominal price for each homework on topic and sub-topics of digestive system. Mixing of food involves three important process. Swallowing, peristalsis and segmentation.

The action of swallowing is performed by skeletal and smooth muscles present in the mouth, pharynx and esophagus. Therefore food is pushed from one compartment to the other i. Likewise, peristalsis is the muscular wave that travels throughout the GI tract.

Therefore, number of peristalsis wave travel from to push the semi-digested food from one tract to the other. Segmentation can be seen only in the small intestine that increases the absorption of nutrients by mixing the food. The process of breaking down large masses of food into smaller molecules is termed as digestion.

It is of two types: The breaking down of large food particles into smaller component that begins from teeth and continues in stomach and intestine is termed as mechanical digestion. Here only the food is broken down. Likewise, when the chemical component of the food is turned down into smaller component like breaking of disaccharide into monosaccharide that begins by the salivary amylase and continues in small intestine and pancreas is termed as chemical digestion.

After the process of digestion, absorption takes place. It begins from stomach where water and alcohol are absorbed whereas rest of the process of absorption takes place in small intestine. Water and Vitamin B and K are also absorbed in large intestine. Throwing out unwanted product from the body is called excretion.

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Apr 13,  · Students face problems in understanding the term digestion. aborted.cf provides digestion homework help for students to get the concept cleared/5().

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Homework Help: Digestive System More Homework Help – Human Body The Digestive System breaks down food into smaller pieces so it can be absorbed into the blood stream and carried to the body’s cells which use it to make energy.

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The digestive system can be hard to learn about because of the confusing terms dealing with different parts of the system as well as everything that aids in digestion. Here are some helpful digestive system terms for kids that will help make learning about the digestive system fun and interesting. There are many organs and structures that make up the Digestive system and these organs or parts have key functions or roles to play which could include one or. Skip to content. SchoolWorkHelper. Your online site for school work help and homework help. Science, English, History, Civics, Art, Business, Law, Geography, all free! Science; English.

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