The digestive system and the role

Digestive System

It normally takes about 36 hours for stool to get through the colon. Smaller amounts of lipase and amylase are secreted. Saliva Saliva moistens and softens food, and along with the chewing action of the teeth, transforms the food into a smooth bolus.

The digestive tract or gastrointestinal tract is a long twisting tube that starts at the mouth and ends at the anus.

The freed vitamin B12 then binds to intrinsic factor which is then absorbed by the enterocytes in the ileum. In lipid metabolism it synthesises cholesterol.

Human digestive system

Wells on May 22, What is the digestive system? All these villi make for a greater surface area, not only for the absorption of chyme but also for its further digestion by large numbers of digestive enzymes present on the microvilli. Your small intestine makes digestive juice, which mixes with bile and pancreatic juice to complete the breakdown of proteins, carbohydrates, and fats.

A The digestive system and the role fungal infection is candidiasis commonly known as thrush which affects the mucous membranes of the mouth.

The third pair are the sublingual glands located underneath the tongue and their secretion is mainly mucous with a small percentage of saliva. The chylomicrons are small enough to pass through the enterocyte villi and into their lymph capillaries called lacteals.

The internal sphincter is always tight, except when stool enters the rectum. Pancreas Action of digestive hormones Pancreas, duodenum and bile duct The pancreas is a major organ functioning as an accessory digestive gland in the digestive system.

The pancreas lies below and at the back of the stomach.

Digestive System

The liver can detoxify various metabolites ; synthesise proteins and produce biochemicals needed for digestion. Adult digestive system Diaphragm The diaphragm is an important part of the body's digestive system. When the stomach is distended with food, the rugae are flattened out and appear smooth.

Written by Diana K.

Function of the Digestive System

About the Digestive System Almost all animals have a tube-type digestive system in which food enters the mouth, passes through a long tube, and exits as feces poop through the anus.

Bile acts partly as a surfactant which lowers the surface tension between either two liquids or a solid and a liquid and helps to emulsify the fats in the chyme. The stomach releases food into the small intestine in a controlled and regulated manner.

Every morsel of food we eat has to be broken down into nutrients that can be absorbed by the body, which is why it takes hours to fully digest food. Cell types in the stomach that help with digestion There are four main types of cells for stomach secretions spread all over the inner surface of the stomach: As the esophagus does not have the same protection from acid as the stomach, any failure of this sphincter can lead to heartburn.

After two hours the stomach has emptied. Most of the blood is returned to the liver via the portal venous system for further processing and detoxification before returning to the systemic circulation via the hepatic veins.

The act of swallowing takes place in the pharynx partly as a reflex and partly under voluntary control. Nerves You have nerves that connect your central nervous system—your brain and spinal cord—to your digestive system and control some digestive functions.

Taste buds are mainly on the upper surface dorsum of the tongue. And this is where the bulk of the partial digestion occurs. It is a hollow, jointed C-shaped tube connecting the stomach to the jejunum.

Human digestive system

Liver The liver has multiple functions, but two of its main functions within the digestive system are to make and secrete an important substance called bile and to process the blood coming from the small intestine containing the nutrients just absorbed.

Food fat is dispersed by the action of bile into smaller units called micelles. As the teeth tear and chop the food, saliva moistens it for easy swallowing.

The smell of food triggers the salivary glands in your mouth to secrete salivacausing your mouth to water.The human digestive system is a series of organs that converts food into essential nutrients that are absorbed into the body and eliminates unused waste material. It is essential to good health.

The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus.

The digestive system uses 3 main processes to move and mix food: Swallowing. Swallowing is the process of using smooth and skeletal muscles in the mouth, tongue, and pharynx to push food out of the mouth, through the pharynx, and into the esophagus.

The digestive system serves the role of taking in nutrients, eliminating waste, and absorbing and using the nutrients we take in. The digestive system includes all the parts of your body that are. 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).

The Digestive System

The liver has multiple functions, but two of its main functions within the digestive system are to make and secrete an important substance called bile and to process the blood coming from the.

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The digestive system and the role
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