Explain the process of digestion that takes place in stomach and small intestine
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Aruna kavitha answered 3 year(s) ago
What is digestion? Briefly explain the process of digestion.
Define digestion. Explain the process of digestion in human beings.
Class-XI Biology
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Asked by Sanalkumar
Feb 5
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Aruna kavitha , SubjectMatterExpert
Member since Jun 30 2014
Sol:
Digestion: Digestion is the process by which food is broken down into simple absorbable substances. Digestion of food takes place in the digestive system. Digestive system is made up of alimentary canal and associated glands.
Parts of alimentary canal:
The mouth, oesophagus, stomach, small intestine and large intestine form the alimentary canal. It is also known as the digestive tract.
Mouth is guarded by upper lip and lower lip. The process of taking in food through mouth is called as ingestion.
Buccal cavity is the inner region of the mouth. It encloses teeth and tongue.
Teeth are of different types namely, incisors, canines, premolars and molars.
Incisors are used for biting food.
Canines are sharp and pointed and are used to pierce or tear food.
Premolars and molars are the principal grinders helping to chew and grind the food.
Tongue is a muscular organ attached to the floor of the buccal cavity at the back. It helps in mixing of food with saliva and swallowing it. It also helps in tasting different types of food with the help of taste buds present on it. The buccal cavity leads into pharynx.
Pharynx is at the back of buccal cavity. The pharynx is the common channel for food and air. When you swallow food, a flap-like valve called the epiglottis closes the windpipe. It prevents the entry of food particles into respiratory tract.
Oesophagus also called as food pipe helps in conveying the food from buccal cavity to stomach. The oesophagus is also known as the gullet. It is about 25 centimetres long. Food inside the oesophagus reaches the stomach by peristalsis movements.
Stomach is the widest part of the alimentary canal. It is a J-shaped muscular organ with stomach occurs with the help of digestive juice. Digestive juice comprises of hydrochloric acid, mucous and some enzymes.
hi mate,
===>>here is information about digestion
digestion begins in the mouth, well before food reaches the stomach.
====>>When we see, smell, taste, or even imagine a tasty meal, our salivary glands in front of the ear, under the tongue, and near the lower jaw begin making saliva (spit).
====>>Once filled with food, the stomach grinds and churns the food to break it down into small particles.
===>>It then pushes the small particles of food into the first part of the small intestine, called the duodenum. The small intestine is where most of the digestion and absorption of our food takes place.
===>>The small intestine is where most chemical digestion takes place. Most of the digestive enzymes in the small intestine are secreted by the pancreas and enter the small intestine via the pancreatic duct.
===>>.. The three major classes of nutrients that undergo digestion are proteins, lipids (fats), and carbohydrates.
===>>Digestion works by moving food through the GI tract. Digestion begins in the mouth with chewing and ends in the small intestine.
===>> As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules.
===>>Also It Important That The Digestive Processes. The processes of digestion include six activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, absorption, and defecation.
===>>The first of these processes, ingestion, refers to the entry of food into the alimentary canal through the mouth.
====>>Unlike the small intestine, the large intestine produces no digestive enzymes. Chemical digestion is completed in the small intestine before the chyme reaches the large intestine.
===>>Functions of the large intestine include the absorption of water and electrolytes and the elimination of feces.
I hope it helps you.