Download file to see previous pages...
The mucus is important for protecting the mucosa from the acidic contents of the stomach. The epithelium is also lined with endocrine cells that stimulate the production of acid and digestive enzymes (Johnson, 2005, 23). The lamina propria lining the stomach is composed of loose connective tissue. Lymph vessels, nerves and large blood vessels are located in the mucosa that is composed of loose connective tissues. In the stomach, the muscularies externa is composed of three layers of muscles that are the oblique inner, circular middle and longitudinal outer layers that run in opposite directions to allow great motility in the stomach for mixing and churning ingested food.
The small intestine mucosa has various structural features that are essential for increasing the luminal surface area supporting the main function of the small intestine of absorption of the degraded food components. Along the mucosa and submucosa are plicae circulares that are crescent shaped folds extend on around 1/3 of the small intestine lumen The lumen is lined with simple columnar epithelium. The ileum and jejunum are covered with serosa while the duodenum has serosa on the anterior surface (Feneis & Dauber, 2000, 42).
The entire mucosa of the intestinal lining forms villi that are important for increasing the surface area that food absorption takes place in. The surface of the villi is composed of simple epithelium for easy absorption. The lamina propria is similar to that of the stomach usually cell rich. The submucosa layer contains glands on the duodenum “Brunner’s glands” that produces mucus protecting the duodenal mucosa from the acidic content from the stomach (Di Mauro et al. 2013, 15). The muscularies externa has two layers the inner thicker circular layer for mixing and the outer thinner longitudinal layer for the continuous peristalsis activity of the small intestines.
It is the
...Download file to see next pagesRead More
Also include where each nutrient is transported and used once it is absorbed. Students should include at least all of the macronutrients and three vitamins and minerals in the process. The diet which Jane Doe has consumed consists of all the three essential macronutrients for survival which are carbohydrates, lipids and proteins.
Fuel happens to be one of the most popular forms of energy in the world for it is used for numerous applications. Fuel itself can be generated from numerous resources, some renewable such as the sun and others scarce such as naturally occurring oil. Energy from waste is one of the revolutions that is currently going on as the world attempts to Go Green and counter the effects of overdependence on fossil fuels, which has choked the atmosphere.
This essay discusses that mechanical digestion occurs in the mouth and mastication occurs when a person starts to chew and grinds the food using the molars and premolars. As the tongue moves around the food inside the mouth when chewing, the soft palate closes the nasal passages and airway so that the food stays inside the mouth.
When human beings take in foods such as vegetables and carbohydrates, they must be broken down to smaller particles that can be absorbed in the blood and body cells. The human digestive system is made up of a combination of organs from the mouth to the anus.
This is done through the help of biological catalysts known as enzymes. Without these chemicals, our body cannot absorb the large molecules of food.
Digestion starts in the mouth where the food is mechanically broken down into tidbits. Then it is passed onto the stomach by way of the pharynx and the esophagus.
Over the course of evolution, appendix has become vestigial as reliance on meat increased and any ingested cellulose is passed out as faeces.
The small intestine, which is specifically designed to maximize the
Nutrient and dietary needs vary according to sex, age and levels of physical activity. Nutrients necessary for bodily function are either macro nutrients or micro nutrients (BRYNIE 2002, pg9).
Macronutrients include the carbohydrate, proteins and fats. Carbohydrates
The author of the paper states that potatoes and bread contains starch whereas milk, potato, and bread contain glucose. Carbohydrates are usually composed of “carbon, hydrogen, and oxygen”. As such, both glucose and starch are forms of carbohydrates which are considered as our body’s main source of energy.
9 Pages(2000 words)Essay
GOT A TRICKY QUESTION? RECEIVE AN ANSWER FROM STUDENTS LIKE YOU!
Let us find you another Essay on topic Digestion for FREE!