The document provides an overview of the digestive system, including:
1) Digestion refers to the breakdown of food into smaller components that can be absorbed into the bloodstream. The digestive system involves both mechanical and chemical breakdown of food.
2) Key parts of the digestive system are mentioned - mouth, stomach, small intestine, large intestine. Functions of each part are described briefly, including the roles of enzymes and absorption.
3) Main end products of digestion are listed as carbohydrates becoming monosaccharides, proteins becoming amino acids, and lipids becoming fatty acids and glycerol.
Digestive System of the Human Body.
Detailed explaination.
According to ICSE syllabus for grade 9.
This Presentation includes: The alimentary canal, organs and their functions, secretions, processes and definitions.
Based on selina publishers- Biology Part 1 grade 9.
Digestive System of the Human Body.
Detailed explaination.
According to ICSE syllabus for grade 9.
This Presentation includes: The alimentary canal, organs and their functions, secretions, processes and definitions.
Based on selina publishers- Biology Part 1 grade 9.
it shows some of the information that you are looking with. this will help to guide about this topic. This only for educational purposes especially to those teachers that are teaching in public and private schools. and, also to those students, you are free to download and use this as your visual aid.. thank you.. Miggy :)
The Human Digestive Organs and its function making it a System.pptxALVINMARCDANCEL2
This is a comprehensive powerpoit presentation on the parts and functions of digestive system.Human digestive system, system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract, or the series of structures and organs through which food and liquids pass during their processing into forms that can be absorbed into the bloodstream. The system also consists of the structures through which wastes pass in the process of elimination and of organs that contribute juices necessary for the digestive process.
In order to function properly, the human body requires nutrients. Some such nutrients serve as raw materials for the synthesis of cellular materials, while others help regulate chemical reactions or, upon oxidation, yield energy. Many nutrients, however, are in a form that is unsuitable for immediate use by the body; to be useful, they must undergo physical and chemical changes, which are facilitated by digestion.
it shows some of the information that you are looking with. this will help to guide about this topic. This only for educational purposes especially to those teachers that are teaching in public and private schools. and, also to those students, you are free to download and use this as your visual aid.. thank you.. Miggy :)
The Human Digestive Organs and its function making it a System.pptxALVINMARCDANCEL2
This is a comprehensive powerpoit presentation on the parts and functions of digestive system.Human digestive system, system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract, or the series of structures and organs through which food and liquids pass during their processing into forms that can be absorbed into the bloodstream. The system also consists of the structures through which wastes pass in the process of elimination and of organs that contribute juices necessary for the digestive process.
In order to function properly, the human body requires nutrients. Some such nutrients serve as raw materials for the synthesis of cellular materials, while others help regulate chemical reactions or, upon oxidation, yield energy. Many nutrients, however, are in a form that is unsuitable for immediate use by the body; to be useful, they must undergo physical and chemical changes, which are facilitated by digestion.
The digestive system is made up of the gastrointestinal tract—also called the GI tract or digestive tract—and the liver, pancreas, and gallbladder. ... The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus.
Digestion
Digestion may be defined as physiological process by which complex food particles are broken down into simple form which are suitable for absorption and subsequent utilization.
Digestive system
Digestive system is the system which involves organs that are responsible for the process of digestion.
Gastrointestinal Tract:
The digestive system is composed of a long muscular tube – the gastrointestinal (GI) tract, or alimentary canal – and a set of accessory organs.
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3. Digestion refers to the breakdown of
food into smaller components that can
be absorbed into the bloodstream.
4.
5. The Digestive System
Different biological processes take place in the human body.
Digestion is one of the main processes among them.
Energy is required for various biological functions & Food is
considered as the source of energy.
These food contain,
Nutrients
Proteins
Carbohydrates
lipids
The process by which the complex organic compounds are
converted into simple compounds so as to be absorbed by the
human body is called digestion of food.
6. • Digestion of food
Mechanical Chemical
Breakdown of
food into smaller
pieces by
chewing
Starch is
converted into
maltose by
salivary amylase.
Starch salivary amylase Maltose
7. Mouth
Bite, chew and swallow
Pharynx &Oesophagus
Transport
Stomach
Bolus is broken down into a chyme
Small intestine
Absorption
Large intestine
Absorption of vitamins (B and K)
Rectum and anus
Defaecation
Functions of digestion
8. 1. Digestion in the Buccal Cavity
2. Digestion in the Stomach
3. Digestion in the Small Intestine
4. End products of Digestion
Stages of Digestion
9. • 1. Digestion in the Buccal Cavity
• Food enters to the digestive system through buccal cavity.
• food is subjected to physical digestion due to the chewing.
• Saliva in the mouth cavity digest starch to maltose.
Starch salivary amylase Maltose
• saliva in the mouth cavity performs the following tasks,
– Helps to stick food particles to form a food bolus
– Makes food substances wet and slippery
• Tongue is important to make the food bolus and to identify a variety of tastes
present in food.
10. Epiglottis
Common chamber for both digestive and respiratory systems.
Situated immediately above the pharynx
Prevents entry of food to the trachea.
Oesophagus /food pipe
Runs from pharynx to stomach
Consist of longitudinal and circular muscles
Food is moved towards the stomach through peristaltic movements
12. • Stomach
Lining of the stomach produce HCL(hydrochloric acid) and pepsin to
breakdown proteins to polypeptides.
Renin - coagulates milk in infants
bolus is converted into ‘Chyme’ in the stomach.
It contains,
Partially digested proteins
Digested and undigested carbohydrates, lipids, water, minerals & vitamins.
When the stomach is empty it contracts and causes a pain which signals
hunger.
Food in the stomach is send to the small intestine through pyloric splinter.
14. 3. Digestion in the Small Intestine
The small intestine consist of 3 parts,
Duodenum
Jejinum
Ileum
Duodenum is a C – shaped tubular structure.
Bile and pancreatic duct open to duodenum.
It’s produced in liver and stored in the gall bladder.
Conversion insoluble lipids to soluble stage in water is known as ‘Emulsification’.
Following table depicts the digestion in the small intestine.
organ enzyme substrate End product
pancreas Trypsin
Amylase
Lypase
Protein
Starch
Lipids
Polypeptides
Maltose
Fatty acids & glycerol
Small intestine Maltase
Sucrase
Lactase
Peptidase
Maltose
Sucrose
Lactose
polypeptides
Glucose
Glucose+Fructose
Glucose+Galactose
Amino acids
15. 4. End products of Digestion
•Carbohydrates monosaccharides
•Proteins amino acids
•Lipids fatty acids + glycerol
16. • What happen to the end products?
• The digestive end products are absorbed into the blood capillaries of the small
projections known by the name villi.
• Fatty acids and glycerol are absorbed into lacteals.
• When high amount of glucose is present in blood converted into glycogen
• When glucose concentration is decreased glucose breaks down to form glucose
• The undigested food is then transferred to the large intestine.
18. •By the time the gut have reached the end of the small intestine, most
of the digested food, water has been absorbed.
•The waste materials consists mainly of,
–Cellulose (fibre)
–Water
–Dead and living bacteria
–Cells lost from the lining of the gut.
•First part of the large intestine, called as colon, is to absorb most of
the remaining water from the contents, leaving a semi-solid waste
material called Faeces.
•This is stored in the rectum, until expelled out of the body through
the anus.
19. Disease Symptoms Reasons Prevention
Gastritis Regurgitation of acid to
mouth.
Burning feeling and pain
in stomach.
Skipping of meals
Mental stress
Consumption of acidic
and spicy food
By following good health
diets.
Constipation Difficulty in defeacation Postponing of
defeacation
Not taking required
volume of water
By avoiding the
mentioned bad habits
Typhoid Pain in arms and legs
Headache
Fever
constipation
Leaving out food in the
air
Intake of pool water
during swimming
Get a vaccine for typhoid.
Destroying places where
flies breed.
Diarrhoea Release of faecal matter
in liquid matter.
Infected with a virus,
bacteria or a parasite
Consumption of more
water.
Wash hands well with a
soap after using the
bathroom
Diseases and disorders related with digestive system
