2. Nutrition in Animals-Alimentary System Science Class 7 In English-CBSE Notes
Explore science cbse notes for Class 7 Chapter 2. Nutrition in Animals Topic Alimentary System in English medium for exams preparation.
2. Nutrition in Animals-Alimentary System Science Class 7 In English-CBSE Notes
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2. Nutrition in Animals-Alimentary System Science Class 7 In English-CBSE Notes
2. Nutrition in Animals
Alimentary System
Bile Juice : Bile jiuce is a secretion of liver that is stored in sac called the gall bladder.
Functions of Bile : The bile plays an important role in the digestion of fats.
Pancreas : The pancreas is a large cream coloured gland located just below the stomach.
Functions of Pancreas :
(i) The pancreatic juice acts on carbohydrates and proteins and changes them into simpler forms.
Absorption : Digested food is obsorbed by the wall of the intestine and passes into the blood vessels. This process is called absorption.
Villi : The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi.
Functions of Villi :
(i) The villi increases the surface area for absorption of the digested food.
(ii) Each villus has a network of thin and small blood vessels close to
its surface.
(iii) The surface of the villi also absorbs the digested food materials.
Assimilation : The absorbed substances are transported via the blood vessels to different organs of the body where they are used to build complex substances such as the proteins required by the body. This is
called assimilation.
Realising of Energy from Disgested food: In the cells, glucose breaks down with the help of oxygen into carbon dioxide and water, and energy is released.
Large intestine : The large intestine is wider and shorter than small intestine. It is about 1.5 metre in length. It starts from the end of small intestine.
Functions of Large Intestine:
(i) It absorbs water and some salts from the undigested food material.
Egestion : The faecal matter is removed through the anus from time-to-time. This is called egestion.
All Topics Chapter 2. Nutrition in Animals
2. Nutrition in Animals-Alimentary System Science Class 7 In English-CBSE Notes
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CBSE Notes for Class 7 science Chapter 2. Nutrition in Animals – Alimentary System
The CBSE Notes for Class 7 science Chapter 2. Nutrition in Animals – Alimentary System are prepared to help students understand every concept in a simple, clear, and well-organized manner. These notes are based on the latest CBSE syllabus and are suitable for regular classroom learning, homework, revision, and examination preparation. Every topic is explained using easy language so that students can learn important concepts without difficulty and develop a strong academic foundation.
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Every chapter contains several important concepts that require careful understanding. Our notes present these concepts in a logical sequence so students can connect ideas easily. Difficult topics are simplified with easy explanations, making learning enjoyable for students of different learning abilities. Whether you are preparing for classroom discussions, assignments, periodic tests, or annual examinations, these notes provide a reliable source for effective revision.
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2. Nutrition in Animals-Alimentary System Science Class 7 In English-CBSE Notes Study Materials For Class 6 to 12
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