Digestive System

The total length of the human digestive tract is approximately 25 to 30 feet (about 7.5 to 9 meters) when fully extended. This includes the esophagus, stomach, small intestine, large intestine, and rectum. The small intestine is the longest part, measuring about 20 feet (6 meters), while the large intestine is around 5 feet (1.5 meters) long. The length can vary among individuals.

All of your organs are important in your bodies function and you wouldn't survive without any, so really this is an impossible question but I would say the two most important organs are the brain and the heart, as the heart pumps your blood around the body making it possible for you to move and live; and your brain makes it possible for you to do anything!

Digestion is controlled by the parasympathetic division of the autonomic nervous system.

In human beings, gravity.

Cells that engulf and digest bacteria and other foreign substances as well as debris from dead cells are called macrophage. Macrophage also stimulate white blood cells to respond to pathogens.

It is better to say that the following is part of the respiratory system:

It includes the windpipe, the lungs and the nose. The respiratory system lets us breathe in oxygen through the nose, going down through the windpipe to the lungs, and then after it has travelled all around our body, comes up the windpipe into our nose as carbon dioxide as we breathe out. Excretion, blood circulation, thinking and nerve control are all not part of the respiratory system.

Stomach

The stomach has a very acidic environment. This favors the breakdown of proteins. An enzyme (i.e. a biological catalyst) called trypsin is active at acidic conditions (gastric juice) and is responsible for the break down of proteins in the stomach.

Enzymes are protein materials found in all areas of the body. In the respiratory system, enzymes act as catalyst for the many chemical reactions.

SaLiva

No, the rupture will leak fecal matter and bacteria of various kinds into the peritoneal cavity. Antibiotics, because they travel through the bloodstream, won't take care of the whole problem. A surgeon will need to go in and wash out the cavity as well as take out the problematic appendix. However, in some cases - if the appendix has been ruptured for a while - for days or weeks- it may be too inflamed and there may be a large pus pocket, or abscess. In these cases, the pus can be removed with a tube called a drain and the patient is given a course of antibiotics. Once the inflammation has calmed down, many doctors recommend having the appendix removed 6 to 12 weeks later so that appendicitis will not recur. Other doctors say the chances of a second case of appendicitis is low (<20% chance it could happen again..) and that it does not need to be removed. If a later surgery is recommended, surgeons can remove it using laparoscopic approach with tiny incisions.

Your body cannot use starch because it is a complex carbohydrate. It must be broken down into shorter carbohydrate strings before being converted into energy

It is waste..............................................

it poops

The digestive system is what converts regular food that we eat into useful form of nutrients which can be used by the rest of the body. Without these nutrients, the other organs would eventually shut down and die. The body does have the capability to convert energy from fat cells for use in the rest of the body. I'm not sure if this is a function of the digestive system, though.

Before the body can use the soluble products formed during digestive action, the nutrients must be absorbed through the lining of the digestive tract. Even though water and small amounts of simple sugars pass through the mucosa of the stomach into the blood stream, most of the absorption takes place in the small intestine. The absorptive area of this section of the digestive passage is increased an estimated 600 fold by the villi, which are fingerlike projections in the lining of the small intestine. Each villi contains a lymph vessel surrounded by a network of capillaries. The nutrients absorbed into the lymph vessel pass into the lymphatic system, and those absorbed by the capillaries empty into the portal vein and are carried direction to the liver The lymph vessels are the "connecting passageways" in the body, between the blood and tissues, by which food material and oxygen are brought to the individual cells. The stomach produces gastric juice and mixes it with food. Gastric juice contains enzymes that begin the digestion of proteins. Proteins are the only substances digested in the stomach. However, they are only partially digested there. The food is churned and mixed with stomach fluids until a thick paste called chyme is produced. The chyme passes through the stomach into the small intestine. Enzymes from the pancreas and intestinal glands continue the breakdown of proteins. They also change starch into simple sugars and fats into fatty acids. The body digests and absorbs fat with the help of bile, which is a thick yellow green fluid released by the liver. Bile is stored in the gallbladder and released into the duodenum. The small intestine may be 7.5 to 9 meters in length. Food is moved along by peristalsis. Digestion is completed in the small intestine.Most chemical digestion and absorption of food occurs in the small intestine. The small intestine is a long, coiled organ about one inch in diameter. The stomach connects with the duodenum, the first part of the small intestine. The duodenum is about one foot long and is shaped like the letter C. The major digestion begins here. The pancreas and intestinal glands play important roles in completing the breakdown of foods. The pancreas is a long, soft gland lying behind the stomach that secretes digestive enzymes into the duodenum. The intestinal glands are tiny organs found in the lining of the small intestines. They release digestive enzymes and mucus. Nutrients are absorbed throughout the small intestine. The villi are very tiny fingerlike projections lining the walls of the small intestine. The surface are of the small intestine is increased by many projections. The increased surface area will allow the small intestine to absorb most of the nutrients of the body. There are blood vessels and vessels contained a fluid called lymph inside the villi. Fat-soluble vitamins and fatty acids are absorbed into the lymph system. Glucose, amino acids, water-soluble vitamins, and minerals are absorbed into the blood vessels. the blood and lymph then carry the completely digested food throughout the body. Enzymes from the pancreas and intestional glands continue the breakdown of proteins. They also change starch into simple sugars and fats into fatty acids. The body digests and absorbs fat with the help of bile, which is a thick yellow green fluid released by the liver. Bile is stored in the gallbladder and released into the duodenum.

Sperm only has a short life once it is released through the penis. It is kept fresh by the semen it travels in until it reaches the fallopian tubes. If released outside the body it soon dries out and dies quickly.

The terms that apply are "ingesting" and "eating" rather than tasting, which may not involve food, or biting, where the food may not require chewing. The broader term "consuming" has other meanings, but the process of consuming food is called "feeding."

Food moves the digestive system through the mouth, pharynx, esophagus, stomach, small intestine, and large intestine. Solid food waste is expelled through the anus, at the end of the digestive tract.

Hydrochloric acid.

So nothing can go backwards and get stuck.

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It also maintains the diffusion gradient if food is moving in one direction so the products of digestion are absorbed faster.

small intestine

Most people only have one bowel movement every day or so. Having more than one might be normal for you, but if it's very runny or odd colored or in any other way unusual, you probably should see a doctor to find out what's wrong.

Starch doesn't digest saliva. The enzyme in saliva digests starch.

It is broken into small pieces of food and digested by the digestive juices.