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The digestive system of the human body comprises a group of organs working together to convert food into energy for the body. Anatomically, the digestive system is made up of the gastrointestinal tract, along with accessory organs such as the liver, pancreas and gallbladder.
- Food Pipe
The food pipe or oesophagus is a long muscular tube which...
- Mouth and Buccal Cavity
The mouth is an important part as it is helpful for speech...
- Large Intestine
Digestion is the process of breaking down complex food...
- Pancreas
The pancreas consists of exocrine glands that produce...
- Small Intestine
Complete Digestion of Food The partially digested food is...
- Peristalsis
The excess fats present in the food particles stop these...
- Nutrients
Nutrients are the organic substances which are required for...
- Exocrine Glands
Exocrine Glands are the glands that secrete substances on...
- Food Pipe
- Ingestion – The Taking in of Food
- Digestion – Breaking The Large Into The Small
- Absorption – Uptake of The Soluble Products of Digestion
- Egestion – The Removal of Undigested Food Materials
Food is taken into the mouth where it is physically broken down by the teeth into smaller pieces. The presence of food in the mouth triggers a nervous reflex that causes the salivary glands to deliver a watery fluid called salivato the mouth. Saliva moistens and lubricates the food, with the aid of a slippery substance called mucin, making swallowi...
The swallowing reflex allows food from the mouth to be moved into the oesophagus. Here, waves of muscular contractions known as peristalsis move food down this thin-walled tube to a muscular bag known as the stomach. Both physical and chemical digestion occurs within the stomach. The continual churning movements of the muscular walls of the stomach...
The small intestine is 5–6m in length, and most of the chemical digestion occurs within the first metre. Once digested into smaller molecules, absorption can take place. Millions of tiny finger-like structures called villi project inwards from the lining of the small intestine. These structures greatly increase the surface area of contact that the ...
On reaching the end of the small intestine, all the digested food products, along with the minerals and vitamins that are useful to the body, should have been removed from the watery contents. What remains consists of the indigestible components of food such as cellulose from the consumption of plant-based foods. These materials are then passed on ...
Digestion is the breaking down of the food we eat into other substances that our bodies can absorb and use. There are mechanical and chemical digestive processes.Mechanical digestion...
- Mouth: The mouth or buccal cavity contains teeth, tongue and salivary glands. Teeth: The teeth are used to chew the food and break it into smaller pieces so that it is digested easily.
- Oesophagus: It is also known as the food pipe . From the mouth, the food is pushed into the food pipe (oesophagus) with the action of the tongue. The walls of the oesophagus contract and expand to help the food move down the pipe into the stomach.
- Stomach: Due to the peristaltic movements of oesophagus, the food enters the stomach where a variety of juices act on it. The food is churned in the stomach for about 3-4 hours where a semi-solid paste is formed.
- Small Intestine: This partially digested food in the stomach now moves forward into the small intestine . The exit of food from the stomach is regulated by sphincter muscle which releases it in small amounts into the small intestine.
Digestion is the process of breaking large, insoluble food molecules into smaller molecules for absorption into the bloodstream. This process involves the use of many digestive fluids and enzymes such as saliva, mucus, bile and hydrochloric acid, among others.
- Protein is one of the essential compounds in our body. Human saliva contains the enzymes lipase and amylase. They mainly digest fats and carbohydra...
- Protein digestion begins when you first start chewing and concludes in the small intestine. To produce more proteins, the body reuses amino acids.
- Digestion of both starch and protein is done by the pancreatic juice. The pancreatic enzymes include lipase, which breaks down triglycerides into f...
- Proteins undergo hydrolysis, which converts them into amino acids, during digestion. The amino acids are dissolved in our blood and transported to...
- The partially digested meal, or chyme, next passes into the small intestine, where intestinal fluids and pancreatic enzymes exist. The pancreatic j...
Mar 5, 2024 · Digestion is the process by which the body breaks down food and absorbs nutrients. It begins in the mouth and continues through the esophagus, stomach, small intestine, and large intestine. Our bodies rely on digestion to obtain energy and essential nutrients from the food we eat.
Sep 11, 2022 · The digestive system has three main functions relating to food: digestion of food, absorption of nutrients from food, and elimination of solid food waste. Digestion is the process of breaking down food into components the body can absorb. It consists of two types of processes: mechanical digestion and chemical digestion.
