Function of the Digestive System

 

outline of digestive system

Dec 18,  · The Human Digestive System The human digestive system is a complex series of organs and glands that processes food. In order to use the food we eat, our body has to break the food down into smaller molecules that it can process; it also has to exc. The digestive system is made up of the digestive tract—a series of hollow organs joined in a long, twisting tube from the mouth to the anus—and other organs that . The digestive system consists of a muscular tube, the digestive tract, also called the gastrointestinal (GI) tract or alimentary canal, and various accessory organs. The digestive tract begins at the oral cavity and continues through the pharynx, esophagus, stomach, small intestine, and large intestine, which opens to the exterior at the anus%(2).


Digestive System : Human Anatomy


The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body. The digestive system is divided into two major parts:.

The treatment of food in the digestive system involves the following seven processes:. Propulsion is the movement of food along the digestive tract. The major means of propulsion is peristalsis, a series of alternating contractions and relaxations of smooth muscle that lines the walls of the digestive organs and that forces food to move forward. Secretion of digestive enzymes and other substances liquefies, adjusts the pH of, and chemically breaks down the food. Mechanical digestion is the process of physically breaking down food into smaller pieces.

This process begins with the chewing of food and continues with the muscular churning of the stomach, outline of digestive system. Additional churning occurs in the small intestine through muscular constriction of the intestinal wall, outline of digestive system.

This process, called segmentation, is similar to peristalsis, except that the rhythmic timing of the muscle constrictions forces the food backward and forward rather than forward only. Chemical digestion is the process of chemically outline of digestive system down food into simpler molecules. The process is carried out by enzymes in the stomach and small intestines. Absorption is the movement of molecules by passive diffusion or active transport from the digestive tract to adjacent blood and lymphatic vessels.

Absorption is the entrance of the digested food now called nutrients into the body. Removing book from your Reading List will also remove any bookmarked pages associated with this title.

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Overview of the Digestive System | Boundless Anatomy and Physiology

 

outline of digestive system

 

Components of the Digestive System. The digestive system is comprised of the alimentary canal, or the digestive tract, and other accessory organs that play a part in digestion—such as the liver, the gallbladder, and the pancreas. The alimentary canal and the . Dec 18,  · The Human Digestive System The human digestive system is a complex series of organs and glands that processes food. In order to use the food we eat, our body has to break the food down into smaller molecules that it can process; it also has to exc. The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body. The digestive system is divided into two major parts: The digestive tract (alimentary canal) is a continuous tube with two openings: the.