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Activity Discussion General Discussion Explain different parts of digestive system

  • Manpreet

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    June 3, 2021 at 1:18 pm
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    Digestive system helps in the digestion and absorption of food that we eat. It starts from mouth and ends at anus.
    The process of digestion begins in the mouth itself. The human mouth, rather the buccal cavity consists of salivary glands that secrete salivary amylase – an enzyme that digests starch. Thus, the food we chew/masticate starts to get digested in the mouth. Almost 30% of the starch gets digested in the mouth.
    The food, now known as the bolus moves to stomach through a long muscular tube like structure called – the oesophagus. The oesophagus does not secrete any enzyme. It simply acts as the passage for the movement of food/bolus. The bolus moves through the oesophagus by peristalsis.

    It reaches the stomach. The stomach is guarded by cardiac spinchter. The food is acted upon by various enzymes. The stomach consists of 3 parts – the upper cardiac region, the middle fundus region and the last pyloric region This food is still semi digested, and in a semi liquid state. The food, now known as chyme and it moves from the pyloric part of the stomach to the small intestine.

    The small intestine is made of 3 parts- duodenum, jejunum and ileum. The walls of the small intestine consists of microvilli that helps in absorption of the food. The small intestine secretes a number of enzymes known as ‘succus entericus’. The enzymes released firstly digests the chyme and then the nutrients are being absorbed. The large intestine does not participate in digestion. It absorbs water and minerals and prepares the wastes, that is passed out from the body as faeces.

    Other parts of the digestive system includes-

    Gall bladder that forms bile that helps in the emulsification of fats, leading to its absorption.

    Pancreas – it secretes most of the enzymes that help in the digestion.

    The food gets digested and absorbed through a complex mechanism. Each nutrient gets broken into its simplest forms and then are absorbed. As for example- the carbohydrates gets broken into starch and then to its monomers that is glucose units. The entire process is a complex mechanism.

  • Kumari

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    June 9, 2021 at 11:27 pm
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    Digestion is a very important process for the proper functioning of our body. Through the process of digestion the nutrients and water is absorbed from the food and used up in the body which gives energy to the body to perform work. Even the working of organs in our body needs energy.The process through which the food enters our body and is then passed through various organs in order to get digested is governed by the digestive system. It comprises of various glands and organs such as salivary glands, mouth, esophagus, stomach, liver, gallbladder, pancreas, small intestine, large intestine, rectum and anus.
    Initially food enters our body from the mouth, the fluid secreted by the salivary gland moistens the food and the teeth churns it. The churned food with the saliva then goes into the food pipe called the esophagu sand through food pipe it reaches the stomach. In stomach it stays for 5-6 hours where the food is mixed and grinded and with the help of certain enzymes and acids the food breaks down and becomes of a paste consistency.
    Then the food enters the small intestine where the process of breaking down of food continues with the help of the secreation of pancreas that is pancreatic juice and liver is bile. Here, the nutrients and broken down into its simplest form such as proteins are broken into amino acids, fats into fatty acids and then are absorbed.
    Then the semi liquid paste enters the large intestine where the water and electrolytes are absorbed from the digested food.
    Then the left over waste collected in the rectum and excreted through the anus and is eliminated out.
    For the process of digestion to take place smoothly as it helps the smoothen the movement of food in the system and cleanses the digestive system. By taking the right amout of water constipation does not takes place.

  • Soniya

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    June 10, 2021 at 2:39 am
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    Human nutrition is accomplished by the foods we consume. Digestion is a critical step for our bodies to operate properly. Water and nutrients from meals are absorbed and then used up in the body during digestion, providing body with energy to accomplish tasks. Even the functioning of our body’s organs necessitates the use of energy. The digestive system is in charge of the process by which food enters our bodies and then passes through numerous organs to be digested. Salivary glands, mouth, oesophagus, stomach, liver, gallbladder, pancreas, small intestine, large intestine, rectum, and anus are among the organs and glands that make up the digestive system.The initial component enters our mouth and is mixed with saliva, after which it is cured with the aid of teeth and passed into the food canal or oesophagus. The food is then delivered into the stomach, where it is digested. The food then passes through the small intestine. Carbohydrates, proteins, and lipids are completely digested with the help of secretions from the liver and pancreas. The food is used to obtain energy, build nutritious tissues, and repair all tissues. The food is then sent to the large intestine to absorb water, and the waste is excreted through the anus.

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