19 Fun Facts About the Digestive System

What is Durian?

Small Bowel Biopsy (Small Intestine Biopsy)
Nutrition Facts Durian, raw or frozen Serving Size: The digestive system consists of alimentary canal and its associated digestive glands. A layer of smooth muscular fibres, transversely or circularly arranged. But the bile duct and pancreatic ducts open separately into the proximal and distal ends of the duodenum respectively. Separate bile ducts are formed.


Digestive System

Sensory papillae are present. Tongue is narrow triangular and fleshy. Its surface is covered with horny material and bears thorn-like projections which carry taste buds and mucous glands.

Tongue is highly specialized, fleshy and muscular and can be moved in different directions. It can be protruded out. Its surface is rugose being covered with numerous papillae along with taste buds.

A pair of internal nostrils open into the roof of the buccal cavity anteriorly. Hard palate is present. A bony palate is wanting in birds but a pair of palatal folds and palatal groove between the two folds are present. Internal nostrils are located dorsal to the palatal folds.

The nasal passages are separated from the buccal cavity by a bony palate. The internal nostrils open into the pharynx nearer to glottis. A bony palate is present covering the roof of the buccal cavity.

A bony palate is absent. But soft palate is formed of two membranous folds. The palate is differentiated into anterior bony hard palate and a soft palate is formed of connective tissue.

The soft palate is produced behind into a process — velum palati hanging down from the roof, which prevents the entry of food into nasal passage. Unicellular mucous glands are present and keep the buccal cavity always wet. Unicellular mucous glands are absent in the epithelium of bucco-pharyngeal region. Uni cellular mucous glands are absent. But multi cellular serous glands are present. Salivary glands are absent. But labial glands are open at the lips which do not play any role in digestion.

Salivary glands which open into the buccal cavity are lingual, mandibular, maxillary, cricoary tenoid, palatinal and sphenopalatinal glands. The multi cellular salaivary glands are four pairs. They are Infra orbital, parotid, sublingual and sub-maxillary glands. Pharynx is marked off. On the roof of pharynx near the junction of two jaws a pair of openings is called Eustachian apertures. Pharynx is not sharply demarcated from the buccal cavity. It receives the openings of esophagus and the glottis.

Esophagus is a narrow tube and straight extends through the neck. Mucous glands are present. Oesophagus is a bng and narrow tube. It has thick walls. Nutrition Facts Durian, raw or frozen Serving Size: It contains vitamin C , folic acid , thiamin, riboflavin , niacin , B6, and vitamin A. Fiber causes bowel movement to increase in bulk, which makes it easier for them to move through the intestinal tract.

Fiber also stimulates peristaltic motion and the secretion of digestive and gastric juices, further easing the entire process. Much of the fiber in durian is insoluble fiber, which also lowers the frequency of diarrhea for people with loose stool. Fiber, in durian, also helps to reduce the amount of cholesterol in the blood by scraping LDL cholesterol bad cholesterol out of the body and quickly removing it before it can do any damage to the cardiovascular system in the form of plaque buildup.

Durian is a rich source of potassium, and since potassium is such an integral part of the salt and fluid balance throughout the cells of the body, potassium levels also dictate blood pressure. When plenty of potassium is present, the blood vessels can relax, reduce the stress on the cardiovascular system, and reduce the chances of developing conditions like atherosclerosis , heart attacks, and strokes.

It turns out that durian has antioxidant properties stemming from its vitamin and organic chemical makeup that actively reduce the number of free radicals in the body.

Eat enough durian, and you can feel, look, and act younger than you have in years! Durian contains tryptophan, the organic chemical closely associated with falling asleep after Thanksgiving since it is found in massive doses in turkey.

By adding tryptophan to your diet, it enters your brain and gets converted to serotonin, which induces a feeling of relaxation and happiness. The excess serotonin then releases melatonin into the bloodstream , which causes the body to feel tired, and eventually pass out.

Because of peristalsis, even if you were to eat while hanging upside down, the food would still be able to get to your stomach. Laundry detergents often contain several different classes of enzymes, including proteases, amylases and lipases. The human digestive system also contains such enzymes.

The digestive system also employs these types of enzymes to break down food. Proteases break down proteins, amylases break down carbohydrates and lipases break down fats. For example, your saliva contains both amylases and lipases, and your stomach and small intestine use proteases.

But the stomach is actually involved in very little chemical digestion, the process that reduces food to the size of molecules, which is necessary for nutrients to be taken up into the bloodstream. After further breaking down the chyme with powerful enzymes, the small intestine absorbs the nutrients and passes them into the bloodstream.

The small intestine is about 22 feet 7 meters long, and about an inch 2. Based on these measurements, you'd expect the surface area of the small intestine to be about 6 square feet 0. That's because the small intestine has three features that increase its surface area. The walls of the intestine have folds, and also contain structures called villi, which are fingerlike projections of absorptive tissue.

What's more, the villi are covered with microscopic projections called microvilli. The stomach is an integral part of the digestive system, but it's not the same in all animals. Some animals have stomachs with multiple compartments.

They're often mistakenly said to have multiple stomachs. Cows and other "ruminants" — including giraffes, deer and cattle — have four-chambered stomachs, which help them digest their plant-based food. But some animals — including seahorses, lungfishes and platypuses — have no stomach.

Their food goes from the esophagus straight to the intestines. Each year, more than , Americans develop a cancer of the gastrointestinal tract, including cancers of the esophagus, stomach, colon and rectum.

About half of these cancers result in death. In , colorectal cancer killed almost 52, people in the U.

Digestive System Anatomy