What Is the Straight Muscular Tube Conveying Food From Pharynx to the Stomach Called?

Your Digestive System

Medically Reviewed by Jennifer Robinson, MD on June 21, 2020

Your digestive system is uniquely designed to turn the nutrient you eat into nutrients, which the body uses for free energy, growth and cell repair. Hither'south how it works.

Oral fissure

The mouth is the beginning of the digestive tract. In fact, digestion starts here every bit soon as you have the starting time bite of a meal. Chewing breaks the food into pieces that are more easily digested, while saliva mixes with food to begin the procedure of breaking information technology downwards into a form your trunk can absorb and employ.

Throat

As well chosen the throat, the throat is the next destination for food you've eaten. From here, food travels to the esophagus or swallowing tube.

Esophagus

The esophagus is a muscular tube extending from the pharynx to the breadbasket. By ways of a series of contractions, chosen peristalsis, the esophagus delivers nutrient to the breadbasket. Just before the connection to the tum there is a "zone of high pressure," called the lower esophageal sphincter; this is a "valve" meant to keep food from passing backwards into the esophagus.

Stomach

The stomach is a sac-like organ with stiff muscular walls. In add-on to holding the food, it's besides a mixer and grinder. The stomach secretes acid and powerful enzymes that go on the procedure of breaking down the food. When information technology leaves the stomach, food is the consistency of a liquid or paste. From there the nutrient moves to the small intestine.

Small Intestine

Made up of three segments, the duodenum, jejunum, and ileum, the small intestine is a long tube loosely coiled in the abdomen (spread out, it would be more than 20 feet long). The pocket-size intestine continues the process of breaking downwardly food past using enzymes released past the pancreas and bile from the liver. Bile is a compound that aids in the digestion of fat and eliminates waste products from the blood. Peristalsis (contractions) is too at work in this organ, moving nutrient through and mixing it up with digestive secretions. The duodenum is largely responsible for continuing the procedure of breaking downwardly food, with the jejunum and ileum being mainly responsible for the absorption of nutrients into the bloodstream.

Three organs play a pivotal office in helping the breadbasket and small intestine digest food:

Pancreas

Among other functions, the ellipsoidal pancreas secretes enzymes into the minor intestine. These enzymes break down protein, fat, and carbohydrates from the food we eat.

Liver

The liver has many functions, but two of its main functions inside the digestive organization are to make and secrete bile, and to cleanse and purify the blood coming from the pocket-size intestine containing the nutrients just captivated.

Gallbladder

The gallbladder is a pear-shaped reservoir that sits just under the liver and stores bile. Bile is made in the liver then if it needs to be stored travels to the gallbladder through a aqueduct called the cystic duct. During a repast, the gallbladder contracts, sending bile to the small intestine.

In one case the nutrients have been captivated and the leftover liquid has passed through the minor intestine, what is left of the food you ate is handed over to the large intestine, or colon.

Colon (Large Intestine)

The colon is a 5- to six-human foot-long muscular tube that connects the cecum (the first part of the large intestine to the rectum (the terminal part of the big intestine). It is made up of the cecum, the ascending (correct) colon, the transverse (beyond) colon, the descending (left) colon, and the sigmoid colon (so-called for its "Due south" shape; the Greek alphabetic character for Due south is chosen the sigma), which connects to the rectum.

Stool, or waste left over from the digestive process, is passed through the colon by means of peristalsis (contractions), start in a liquid state and ultimately in solid form equally the water is removed from the stool. A stool is stored in the sigmoid colon until a "mass move" empties information technology into the rectum once or twice a solar day. It normally takes about 36 hours for stool to get through the colon. The stool itself is mostly food debris and bacteria. These bacteria perform several useful functions, such equally synthesizing various vitamins, processing waste product products and food particles, and protecting against harmful bacteria. When the descending colon becomes total of stool, or feces, information technology empties its contents into the rectum to begin the process of elimination.

Rectum

The rectum (Latin for "direct") is an 8-inch chamber that connects the colon to the anus. It is the rectum'due south task to receive stool from the colon, to let yous know there is stool to be evacuated, and to concur the stool until evacuation happens. When anything (gas or stool) comes into the rectum, sensors send a message to the brain. The brain then decides if the rectal contents can be released or not. If they can, the sphincters (muscles) relax and the rectum contracts, expelling its contents. If the contents cannot be expelled, the sphincters contract and the rectum accommodates, so that the sensation temporarily goes away.

Anus

The anus is the concluding part of the digestive tract. It consists of the pelvic floor muscles and the two anal sphincters (internal and external muscles). The lining of the upper anus is specialized to detect rectal contents. Information technology lets the states know whether the contents are liquid, gas, or solid. The pelvic flooring muscle creates an bending between the rectum and the anus that stops stool from coming out when it is non supposed to. The anal sphincters provide fine control of stool. The internal sphincter keeps us from going to the bathroom when nosotros are asleep, or otherwise unaware of the presence of stool. When we get an urge to become to the bath, nosotros rely on our external sphincter to keep the stool in until nosotros can go to the toilet.

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Source: https://www.webmd.com/heartburn-gerd/your-digestive-system

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