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Digestive System
Digestive System is the category for questions regarding the breakdown and absorption of food-stuffs in our alimentary canal. Questions about the stomach and intestines can be included in this category.
7,599 Questions
What are some symptoms of bile duct obstruction?
Jaundice is the first symptom in 90% of patients.Additionally, the patient may experience generalized itching.Normally.bile actually gives stool its brown color.But when the biliary tract is obstructed by tumor, the stools may appear pale.
Why is it necessary for larger animals to have a digestive system?
because if they dident then non of the vitamins or minerals from the food eaten could be extracted and taken around the body, also if they dident digest the food would stay in the stomach and just stay there, therefore eventually they would not be able to eat any more (as the food is just sitting in the stomach and it will fill because its not going anywhere) which will mean they will die, also if food is left rotting in the stomach then the animal would also gain poisons from all the decay and this would be sent around the body and also eventually kill the animal.
What is digested in the Rectum?
Nothing is digested in the rectum, the rectum is the final storage place for feces before they are excreted.
All cells has plasma,they are very important!!!
What happens to food when it passes through the esophagus?
It goes into the stomach and gets digested.
Why are the six nutrients in the body needed to carry out homeostasis?
All of the six nutrients in the body are needed to carry out homeostasis and other bodily processes mainly because the six nutrients:
- Water
- Carbohydrates
- Proteins
- Fats
- Vitamins
- Minerals
Are all essential to the bodies health and to carry out functions such as homeostasis and bodily processes such as digestion the body needs the six essential nutrients to "keep it going".
What household items could represent the organs of the digestive system?
toothpaste tub for the rectum.
How do you stop having green feces?
The color of your "poo" is influenced by several things, especially the foods you eat. Certain foods, notably spinach, can cause your stools to appear greenish in color; so can drinks that have a lot of green food coloring in them. Another cause of greenish stools is a digestive illness such as diarrhea. In general, greenish poo is not harmful, although if you have persistent diarrhea, you should certainly take medicine to treat it.
What substances help to digest fat?
Since much of the human body is water, foods must be digested in an aqueous solution. This presents a problem for fats that are not water soluble. To aid fat digestion, the body breaks down fat by first using emulsifiers that help suspend it in a liquid, and then using enzymes that break it down. Once it is broken down, fat can be absorbed and distributed to the various parts of the body.
Normally, digestion starts in the mouth as enzymes in saliva start to break food down. This process is not as effective for fat, which instead is sent down to the stomach largely unchanged. In the stomach, food usually mixes with gastric juices and is transformed intochyme. Again, the watery solution of the stomach is not conducive to breaking down fat, and so true digestion doesn't take place until it reaches the small intestine.
There are two organs in the body that secrete substances essential to fat digestion: the liver and the pancreas. The pancreas secretes lipase, a substance that breaks down food, including fat, and the liver secretes bile, a substance that emulsifies fat. Without bile, the lipase would not be able to digest fat efficiently. When food enters the small intestine, lipase is secreted into the area via the main pancreatic duct through the hepatopancreatic ampulla. It then breaks down food into simpler particles.
Where are nutrients absorbed into the blood through the walls of?
It passes through the wall of the digestive system, then into the blood.
What kind of molecule performs chemical digestion in the stomach?
Protein is the only nutrient broken down in the stomach. This is because only protease enzymes are present in the stomach acid.
What type of digestion is aided by the action of stomach muscles?
In the mouth, the muscle help the teeth in cutting and breaking the food particles.
In the gastrointestinal tract, smooth muscles are present in the walls of the gastrointestinal tract ,and they help in the peristalsis which are the muscle contractions that produce the bowel movements which help in the movement of food (chyme) comming out of stomach into the intestines and through the intestines.
Also, muscles help closing and opening the sphincters present throughout the gastrointestinal tract.
What happens to food in mechanical digestion?
No mechanical changes take place while food is being digested. However a couple mechanical processes happen to aid digestion. The first of these is the chewing or grinding of the food in the mouth and the second of them is the peristaltic contractions of the muscles of the digestive system to churn up the food with the digestive juices and move it though the intestines.
How long does it take to digest a egg?
It depends on what you've eaten and if you've eaten a lot of carbohydrates, then that will take a while. but if you ate soup then that will take maximum half an hour and you'll definitely go to the bathroom. On the other hand if you've eaten Veggies , then that will take maximum 1 hour, and if you've eaten Meat then that will take approx. 1 hour and a half.
Top Tip:It will take almost 7 hours to digest a chewing gum!!!! If you swallow it. of course !!
How long does bread take to digest?
Different types of complex carbs take different amounts of time to digest. High glycemic index carbs take longer than low glycemic index carbs. Carbs such as basmati rice, nuts, and steel cut oats can take as long as three to four hours to digest.
chewing and peristalsis. basically body functions that mash up food.
How are the processes of digestion and absorption similar?
The processes of digestion and absorption are similar because they both involve absorbing a substance. :)
Is all the food you eat used in the body during digestion?
Before answering this question you should be aware of the meaning of food and different types of food.
The body needs Proteins, Carbohydrates and fat in order to grow. But this can not function without the breaking of food i.e Digestion. Digestion helps the food to be broken down into simple particles so that can enter the body through the flow of blood.
In mammals, food enters the mouth, being chewed by teeth, with chemical processing beginning with chemicals in the saliva from the salivary glands. Then it travels down the esophagus into the stomach, where acid both kills most contaminating microorganisms and begins mechanical break down of some food (e.g., denaturation of protein), and chemical alteration of some. After some time (typically an hour or two in humans, 4-6 hours in dogs, somewhat shorter duration in house cats, ...), the results go through the small intestine, through the large intestine, and are excreted during defecation.
Human digestion processUpper and Lower human gastrointestinal tract
The whole digestive system is around 9 meters long. In a healthy human adult this process can take between 24 and 72 hours.
Phases of gastric secretion- Cephalic phase - This phase occurs before food enters the stomach and involves preparation of the body for eating and digestion. Sight and thought stimulate the cerebral cortex. Taste and smell stimulus is sent to the hypothalamus and medulla oblongata. After this it is routed through the vagus nerve and release of acetylcholine. Gastric secretion at this phase rises to 40% of maximum rate. Acidity in the stomach is not buffered by food at this point and thus acts to inhibit parietal (secretes acid) and G cell (secretes gastrin) activity via D cell secretion of somatostatin.
- Gastric phase - This phase takes 3 to 4 hours. It is stimulated by distention of the stomach, presence of food in stomach and decrease in pH. Distention activates long and myentric reflexes. This activates the release of acetylcholine which stimulates the release of more gastric juices. As protein enters the stomach, it binds to hydrogen ions, which lowers the pH of the stomach to around pH 1-3. Inhibition of gastrin and HCl secretion is lifted. This triggers G cells to release gastrin, which in turn stimulates parietal cells to secrete HCl. HCl release is also triggered by acetylcholine and histamine.
- Intestinal phase - This phase has 2 parts, the excitatory and the inhibitory. Partially-digested food fills the duodenum. This triggers intestinal gastrin to be released. Enterogastric reflex inhibits vagal nuclei, activating sympathetic fibers causing the pyloric sphincter to tighten to prevent more food from entering, and inhibits local reflexes.
There fore; All kinds of food must be digested.
What is the approximate time to digest a meal in hours?
in humans, probably about 8 hours, mouth to anus
