What is the digestive system pdf?

The digestive system consists of the alimentary canal and its principal associated organs, namely, the tongue, teeth, salivary glands, pancreas, liver, and gallbladder . As it passes through the alimentary canal, food is broken down physically and chemically so that the degraded products can be absorbed into the body.

What is the answer for digestive system?

The digestive system is made up of organs that are important for digesting food and liquids. These include the mouth, pharynx (throat), esophagus, stomach, small intestine, large intestine, rectum, and anus .

What is the digestive system Grade 9?

The digestive system of the human body comprises a group of organs that work together in converting food into energy and other basic nutrients to power the body . The food we take in is digested and utilized by our body, and the unused parts of the food are defecated.

What is the digestion question and answer?

Digestion is the process by which the complex food is broken down into simpler, soluble chemical compounds which is then used as nutrients by the body . It is a catabolic process. The food is digested physically, by mouth or chemically, by enzymes. Was this answer helpful?

Which organ absorbs water?

Small intestine . The walls of the small intestine absorb water and the digested nutrients into your bloodstream. As peristalsis continues, the waste products of the digestive process move into the large intestine.

What is the digestive system full summary?

The digestive system is a long, twisting tube that starts at the mouth and goes through the oesophagus, stomach, small intestine, large intestine and ends at the anus . The digestive system breaks down food into simple nutrients such as carbohydrates, fats and proteins.

What are the 7 steps of digestion?

The processes of digestion include seven activities: ingestion, propulsion, mechanical or physical digestion, chemical digestion, secretion, absorption, and defecation .

What are the 12 parts of the digestive system and their functions?

Table 1. Functions of the Digestive Organs (summary) Organ Other functions Pharynx Lubricates food and passageways Esophagus Lubricates food and passageways Stomach Stimulates protein-digesting enzymes Secretes intrinsic factor required for vitamin B 12 absorption in small intestine 6 more rows

What are digestive system notes?

The digestive system converts the foods we eat into their simplest forms, like glucose (sugars), amino acids (that make up protein) or fatty acids (that make up fats). The broken-down food is then absorbed into the bloodstream from the small intestine and the nutrients are carried to each cell in the body.

What is digestion class 9?

Answer: Digestion is the process in which the complex chemical compounds present in the food are broken down into simpler substances that are readily absorbed and utilized by the body .

What is digestion in very short answer?

Digestion is the process of mechanically and enzymatically breaking down food into substances for absorption into the bloodstream . The food contains 3 macronutrients that require digestion before they can be absorbed: fats, carbohydrates, and proteins.

What organ neutralizes stomach acid?

The pancreas makes enzymes that help digest proteins, fats, and carbs. It also makes a substance that neutralizes stomach acid. These enzymes and bile travel through special pathways (called ducts) into the small intestine, where they help to break down food.

What is the digestive system basic explanation?

The digestive system converts the foods we eat into their simplest forms, like glucose (sugars), amino acids (that make up protein) or fatty acids (that make up fats) . The broken-down food is then absorbed into the bloodstream from the small intestine and the nutrients are carried to each cell in the body.

Digestive System - Year 9 PDF Download (2024)

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Table of contents
CIE IGCSE Biology
7.1.2 Digestive System
Identifying Organs of the Digestive System
Organs of the Digestive System: Function

CIE IGCSE Biology

Revision Notes

IGCSE Biology CIE Revision Notes 7. Human Nutrition 7.1 Human Diet & Digestion 7.1.2 Digestive System

7.1.2 Digestive System

Test Yourself

Identifying Organs of the Digestive System

The human digestive system

The human digestive system

Organs of the Digestive System: Function

Food enters the body and moves through 5 stages in the alimentary canal:
Ingestion: This is when substances like food and drink are taken into the body through the mouth.
Mechanical digestion: Involves breaking down food into smaller pieces without changing the chemical structure of the food molecules.
Chemical digestion: Refers to the breakdown of large, insoluble molecules into smaller, soluble molecules.
Absorption: The process where small food molecules and ions move through the intestinal wall into the bloodstream.
Assimilation: The movement of digested food molecules into body cells where they are utilized and become part of the cells.
Egestion: The elimination of undigested or unabsorbed food, such as feces, through the anus.

Stage	Description
Ingestion	The intake of food and drink through the mouth.
Mechanical digestion	Breaking down food into smaller pieces without altering its chemical composition.
Chemical digestion	Conversion of large, insoluble molecules into smaller, soluble ones.
Absorption	Movement of nutrients through the intestinal wall into the bloodstream.
Assimilation	Utilization of digested food by body cells, incorporating them into cell structures.
Egestion	Elimination of undigested food as feces through the anus.

Function of Digestive Organs
- Ingestion: The process of taking substances like food and drink into the body through the mouth.
- Mechanical Digestion: The breakdown of food into smaller pieces without changing the chemical composition of the food molecules. For example, chewing food in the mouth.
- Chemical Digestion: The breakdown of large, insoluble molecules into smaller, soluble molecules through chemical processes. An example is the action of enzymes in the stomach breaking down proteins.
- Absorption: The movement of small food molecules and ions through the intestinal wall into the bloodstream for distribution to cells and tissues. For instance, nutrients like glucose being absorbed into the blood from the small intestine.
- Assimilation: The process where digested food molecules are taken up by cells in the body to be used for energy or as building blocks for growth and repair. An example is amino acids from digested proteins being used to build muscle tissue.
- Egestion: The elimination of undigested or unabsorbed food material from the body in the form of feces through the anus. This includes indigestible parts of food like fiber.

Functions of the Digestive Organs Table

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Digestive System - Year 9 PDF Download (2024)

CIE IGCSE Biology

Revision Notes

7.1.2 Digestive System

Identifying Organs of the Digestive System

Organs of the Digestive System: Function

Top Courses for Year 9

Top Courses for Year 9

Viva Questions

Digestive System - Year 9

video lectures

Free

Digestive System - Year 9

Objective type Questions

past year papers

shortcuts and tricks

study material

Extra Questions

Important questions

Summary

Semester Notes

pdf

MCQs

practice quizzes

Exam

Previous Year Questions with Solutions

mock tests for examination

ppt

Digestive System - Year 9

Sample Paper

FAQs

What is the digestive system pdf? ›

What is digestion in very short answer? ›

References

Table 1. Functions of the Digestive Organs (summary)
Organ	Other functions
Pharynx	Lubricates food and passageways
Esophagus	Lubricates food and passageways
Stomach	Stimulates protein-digesting enzymes Secretes intrinsic factor required for vitamin B₁₂absorption in small intestine