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Os tegumentos [PDF] MIRIÁPODOS - [ Translate this page ] File Format: PDF/Adobe Acrobat - Quick View by M INSECTOS Tegumento blando. Tegumento. Tegumento. Respiracion. Sistema circulatorio y tejidos adyacentes. Digestion. Excrecion. Nutricion y metabolismo. Crecimiento. Reproduccion. Musculos y. Su tegumento en general es pardo, a veces de tono amarillento y/o con manchas . de tegumento no demasiado esclerificado, y otros insectos no malolientes.
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Agisce anche da organo termoregolatore, secretore, escretore e di assorbimento. Therefore, the use of movement rates described by simple first-order kinetics is inappropriate. So that the bolus cannot pass to the intestine until it has been digested, but cannot either flow back to the oesophagus.
The stomach wall releases extremely acidic gastric juices, rich in degradative enzymes that destroy large molecules, transforming them into smaller ones, such as the enzyme called Pepsine, that breaks down proteins transforming them into simple amino acids.
The stomach wall, besides, carries out abrupt peristaltic movements that provoke the mechanical digestion of food and improve the chemical digestion mixing the food with the gastric juice. The food after being digested by the stomach is called chyme.
The final chemical and physical digestive process of the food takes place in the small intestine. The chemical digestion in the tegumento insectos intestine is carried out by the pancreatic juice.
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This liquid is rich in degradative enzymes: Pancreatic juice and gall also neutralise the pH of the chyme, which is very acid due to the hydrochloride acid of the stomach.
Emulsification of fats is another important function tegumento insectos gall. tegumento insectos
This emulsification is essential to improve tegumento insectos absorption of lipids and fats by the small intestine. The food after being digested in the small intestine is called chyle.
And chyle is the final product ready to be absorbed by the small intestine. As we studied before, the inner wall of the intestine is profusely folded to increase the surface in contact with the food, improving the absorption of nutrients. The exterior of the tegumento insectos intestine is highly vascularised, so that the nutrients are transported directly from the inner part of the intestine to the blood vessels and lymphatic system.
The transportation of nutrients is a controlled process tegumento insectos only small digested substances, such as simple sugars, amino acids or small fats are able to trespass the barrier. Large intestine hardly absorbs any nutrient, only some vitamins released by bacteria and, above all, large amounts of water.
The inner surface of the large intestine is smooth, with no folds merely because they are not necessary. The absorption of water is extremely important, preventing our body from dehydration.
After this process, all the dehydrated remains, made up of non digested and non absorbed substances reach the end of the tube and are released, during the defecation, through the anus. As we studied, liver is responsible for tegumento insectos of gall, but it has also other important digestive functions.
First, it is responsible for storing some nutrients, such us sugars forming a macromolecule made of large chains of sugar called glycogen and fats.
Second, liver transforms toxic products, such as cholesterol and bilirubin tegumento insectos releases them into the intestine, so that they are expelled them to the exterior.
And third, liver is responsible for many metabolic reactions, such us gluconeogenesis, a group of chemical reactions essential to produce glucose from other simpler metabolic products. The pancreas is very important to control some digestive processes.
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It produces two hormones, insulin and glucagon, that control the glucose tegumento insectos. Insulin is produced when the glucose level rises, promoting actions to reduce it. On the other hand glucagon is produced when the glucose level drops, promoting actions to increase it. This actions are very important, because the glucose tegumento insectos in blood must stay relatively constant.