Obstacles Affecting The Human Body

The digestive system absorbs the minerals and nutrients from the foods that have been eaten. The break down of food beings in the mouth, where the

The esophagus is a collapsible, muscular mucous lined tube about 25 cm long and extend from the pharynx to the stomach. It is the first segment of the digestive tube and its muscular wall make it a dynamic passageway able to push food toward the stomach. Each end of the esophagus is guarded by a muscular sphincter. The upper sphincter helps to prevent air from entering the tube during respiration, and the lower sphincter normally prevents backflow of the acidic stomach content.

After passing through the pharynx, the bolus then travels to the esophagus. It is a soft muscular tube that attaches the pharynx to the stomach. It carries the bolus along its distance.

This is a tube that connects the throat to the stomach and is the tunnel in which moves food from the mouth to the stomach. Through contracting and relaxing of the esophagus muscles, know as peristalsis your food is welcomed into the lower part of the esophagus, known as the esophageal sphincter. Here there is a valve that is normally closed but once food comes into contact with it, it opens and lets food into the stomach.

We will begin our journey through the human body by entering the test subject through the digestive system, which begins with the mouth. As we are quickly inhaled by our ravenous subject, notice how mastication enables food to be broken down by saliva and the simultaneous mashing and gnawing of teeth. Moving from the front center of the subject's mouth to the back, you will notice the various types of teeth that include: two sets of incisors, a set of canines, a set of premolars, and a set of first and second molars (Thibodeau, 1992). During mastication, a clear substance known as salivary amylase is secreted to facilitate chewing and begin the digestive process. This fluid will facilitate our journey down to the esophagus and into the stomach. Located below us in the mouth is the tongue and right above us

Food begins the journal through the mouth. Inside the mouth the saliva, teeth and tongue aid in the digestion of the food by chopping the food into small pieces which are then moisturised by the saliva to help the tongue and other muscle push the food into the pharynx ( throat)

Digestion begins with the process of mastication; food enters the mouth and the teeth begin to crush and grind the food into smaller pieces to form a bolus. Saliva is secreted from nearby salivary glands, which not only moistens food for easier swallowing, but also begins chemical digestion. Swallowing (deglutition) occurs next; at the beginning of a swallow the tongue voluntarily pushes the bolus upwards against the palate and backwards towards the pharynx. Involuntary reflexes are then initiated in order to prevent food from entering the respiratory tract; the uvula closes off the nasal cavity and the epiglottis covers the glottis and seals off the larynx. As the bolus approaches the esophagus the upper esophageal sphincter (UES) relaxes

Ingestion is the act of food actually entering the alimentary canal through the mouth, where said food is chewed and mixed with saliva from the glands in our mouth. The act of chewing and mixing the food with saliva initiates the digestion process, breaking down some carbohydrate with some lipids and enables the food to be formed into a bolus so this food can be swallowed. After this first process, the second process of propulsion takes place, which is accomplished be the act of swallowing the food itself and the act of peristalsis. Peristalsis moves food through the esophagus to the stomach via alternating waves of muscle contractions in the esophagus, where once the food has made its way to the stomach by the process of propulsion the next process of mechanical occurs in the stomach. Although yes, the act of chewing the food in the mouth is a form of mechanical digestion, mechanical digestion also occurs in the stomach where the food is churned in order to be broken down even further and also occurs in the small intestines where muscles continue to further break down the food into smaller pieces. As for chemical digestion, it has previously been mentioned that this process initiates in the mouth via the breakdown of carbohydrates by enzymes in the

Human digestion starts in the mouth. A human chews food with 32 teeth, which have flat surfaces for grinding and breaking down food. Enzymes contained in the saliva contribute to this breakdown of the food, which is being digested before it reaches the stomach.

Smell that yummy pumpkin pie? Mouth is getting watery. You start to salivate. That is the beginning process of digestion getting you ready to eat that delicious pumpkin pie. That’s why people say digestion starts in your mouth. The digestive tract also known as the alimentary canal, the liver, pancreas, and other abdominal organs make up the digestive system. The esophagus, the stomach, and the intestines, (from the mouth to the anus) all belongs in the alimentary canal. In an adult the whole

The heart is divided in to four different chambers, the Atria is the upper chambers of the heart, which receive blood returning to your heart either from the body or the lungs. The right atrium receives de-oxygenated blood from the superior and inferior vena cava. The two atria are separated by a septum into the left atrium and the right. The left of which receives oxygenated blood from the left and right pulmonary veins.

Peristalsis is the successive contractions of a muscular organ, which moves gut contents along. (Henderson 2011) Peristalsis within the oesophagus moves the ingested food down and into the stomach.

Most of us think that the process that takes place in our stomach after we eat a meal it’s very easy and simple when the truth is that it’s a very complex process. The process of digestion starts even with the simple thought of food, after that the body starts preparing the stomach for the food that is about to be eaten. The food goes then through our mouth into our stomach, where is digested and dumped into the intestines to be thrown away. In order for our stomach to digest the food completely, it has to go through three different stages and that’s where the process of digestion occurs. The first stage it’s called cephalic phase, in this stage or phase, the brain perceives any sight, smell or taste of food, sending impulses to the brainstem

The digestive process is the process by which foods are broken down, absorbed or excreted by the body. Digestion start from the mouth. Mastication is the broken down of food into smaller particles and saliva contain mostly water which aid in chewing and swallowing. It also contain important enzyme amylase, that begin the broken down of starches or carbohydrate. The food passes the esophagus from the mouth, a long tube which connect from the mouth to the stomach. The muscle on the upper part of the stomach relaxes to receive large volumes of swallowed food or liquid from the esophagus. Stomach is a muscle that helps to break down food into smaller pieces. Small intestine comes next in the order of digestive system. The small intestine is an

Food is made up of four types of organic compounds: carbohydrates, proteins, lipids, and nucleic acids. As food is ingested, the beginning stage of the digestive system is the first mechanical process of breaking down of foods in the mouth. Food is chewed, moistened and softened by saliva, and made into a bolus for swallowing. Saliva, made of mostly water, comes from intrinsic and extrinsic salivary glands. These salivary glands are exocrine glands that are activated by impulses sent by the facial and glossopharyngeal nerves. The parotid gland is an extrinsic salivary gland located outside of the oral cavity that secretes serous saliva, the enzyme rich saliva, which contains salivary amylase (Jones, 2017). Enzymes are proteins that act as