Longitudinal And Vircular Muscles

Swallowing is the movement of food from the mouth into the Esophagus. The esophagus secretes mucus and transports the food to the stomach via peristalsis.

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The stomach is an organ that is part of the digestive system. The stomach is located in the upper left part of the abdominal cavity, below the diaphragm and next to the liver (Stomach, 2013). The inner walls of the stomach contain small pores called gastric pits. The gastric pits contain cells that secrete chemicals that aid in the digestion of food (Nguyen, 2015). In this essay, I will discuss the different cell types of the stomach, how they work together to provide the overall function of the stomach, why each organ requires different cell types, why the stomach can’t be comprised of just one cell type, and the advantage of having different types of cells.

The control of gastric secretions happens when the secretion of the gastric juice by the stomach is stimulated by both of the nerves and the hormones. There are three phases in which this happens;

Epithelium – Epithelium tissues are composed of layers of the cells that are closely packed together which is specialised to form the covering or lining of both external and internal surface of body such as surface of your skin and internal digestive system. The main function of epithelium tissues are to provide protection like skin that protects you from injury, secretion like glands such as enzymes, and to absorb materials like intestine such as waste products etc.

What are the three sections of the large intestine and what roles does each play in digestion or absorption?

In this assignment I’m going to talk about the structure of the main tissues which are found within the body as well as what their role is in the terms of two named organs of the body. Tissues are a collection of similar cells that group together to carry out a specific function within the body. There are four different types of tissue found in the human body which include; epithelial tissue; connective tissue; muscle tissue and nerve tissue.

Consist of oral cavity, esophagus, gallbladder, liver, stomach, duodenum, pancreas, colon, cecum, appendix, jejunum, and rectum.

The longitudinal layer is 2.5 mm thick and the thickness decreases with age. Cranially the layer is predominantly muscular while fibro-elastic caudally. The fibro-elastic tissue of the longitudinal layer is continuous with the fibro-elastic network outside the sphincter to the perianal skin to form the corrugator cutis ani, thereby forming an intra-sphincteric fibro-elastic network passing through the external sphincter(Stoker, 2009).

The mesentery is a continuous structure that holds your large and small intestines in place. It provides blood flow and contains lymph nodes. It plays an important role in gut integrity and in gut health. Every time a surgeon cuts into the cut to treat some portion of the intestines, they also cut into the mesentery.

Smooth muscle is found in the walls of hollow organs such as the stomach and other organs of the gastrointestinal tract, and bladder, arteries, veins and lymph ducts.

supply more oxygenated blood in time to assist with the activity the muscle is undertaking. If a

* To protect deeper structures, this can be found in the vagina, mouth, tongue and the oesophagus this is lined by stratified epithelia (simple) which then consist of layers being squamous, cuboidal or columnar cells which eventually become flattened due to pressure from below as the rech the surface.

Underneath the gastric mucosa lies the submucosa, muscularis, and serosa layers. The submucosa consists of connective tissues, blood vessels and nerves. The blood vessels provide nutrients to the lining of the stomach and the nerves monitor smooth muscle contraction. This smooth muscle layer is called the muscularis and is composed of 3 layers of muscle fibers which aid in the mixing and propulsion of food through the digestive tract. Surrounding the muscularis is the serosa, which is the outermost layer of the stomach. It consists of a thin membrane which secretes serous fluid to prevent friction of the outside wall of the stomach as it expands.

These barrier-forming cells are called "endothelial cells". You can think of "endothelial" as a synonym for "lining" or even just "barrier".