Class 7 Nutrition in Animals Notes for exams

Official CBSE Study Materials for Class 7 Science

Access comprehensive study materials and useful resources for Chapter 02 Nutrition in Animals using the Class 7 Nutrition in Animals Notes for exams. Designed to align with the 2026-27 CBSE academic guidelines, these advanced resources help Class 7 Science students reinforce core concepts beyond standard textbooks.

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Access the complete useful resource PDF for Class 7 Science below. Regular practice with these targeted academic notes builds familiarity with complex topics and helps secure higher marks in final school evaluations.

Class 7 Nutrition in Animals Notes for exams. There are many more useful educational material which the students can download in pdf format and use them for studies. Study material like concept maps, important and sure shot question banks, quick to learn flash cards, flow charts, mind maps, teacher notes, important formulas, past examinations question bank, important concepts taught by teachers. Students can download these useful educational material free and use them to get better marks in examinations.  Also refer to other worksheets for the same chapter and other subjects too. Use them for better understanding of the subjects.

NUTRITION IN HUMANS

• The alimentary canal and the associated glands together constitute the digestive system.

• Food is taken into the mouth through the mouth. This process of taking food into the body is called ingestion.

What happens to the food in different parts of the digestive tract?

The mouth :

Our mouth has the salivary glands which secrete saliva. The saliva breaks down the starch into sugars.

Oesophagus –

• It is a long, narrow, muscular tube which directly leads to the stomach.

• It is about 25 cm long and passes downwards through the neck, the thorax and the abdominal cavity.

• Oesophagus gently pushes masticated food down to the stomach in a wave - like action, called peristalsis.

The stomach:

• The inner lining of the stomach secretes mucous, hydrochloric acid and

• digestive juices.

• The mucous protects the lining of the stomach by neutralizing acid produced by gastric juice.

• The hydrochloric acid kills many bacteria that enter along with the food and makes the medium in the stomach acidic.
 
• The digestive juices break down the proteins into simpler substances.
 
The small intestine:
 
• The small intestine is highly coiled and is about 7.5 meters long.
 
• Liver (reddish brown) is the largest gland in the body.
 
• It secretes bile juice that is stored in a sac called the gall bladder. It digests fats.
 
• The pancreas is cream colored gland secretes pancreatic juice that acts on carbohydrates and proteins and changes them into simpler forms.
 
• The carbohydrates get broken into simple sugars such as glucose, fats into fatty acids and glycerol, and proteins into amino acids
 
• The digested food can now pass into the blood vessels in the wall of the intestine having
 
• thousands of finger-like villi .
 
• The surface of the villi absorbs the digested food materials. The absorbed substances are transported via the blood vessels to different organs of the body.
 
• Large intestine: The food that remains undigested and unabsorbed then enters into the large intestine.
 
• It is about 1.5 meter in length.
 
• Its function is to absorb water and some salts from the undigested food material.
 
DIGESTION IN RUMINANTS
 
A process in which partially digested food returns to the mouth in small lumps and the Rumination: animal chews it. This type of process is called Rumination and such types of animals are called Ruminants. How does digestion occur in Ruminants grass-eating animals?
 
• Ruminants quickly swallow the grass and store it in a separate part of the stomach called rumen. Here the food gets partially digested and is called cud.

• Later the cud returns to the mouth in small lumps and the animal chews it. This process is called rumination.

•The cellulose present in grass is digested here by the action of certain bacteria which are not present in humans.

DIGESTION IN AMOEBA:

Amoeba is a single-celled organism found in pond water. It has a cell membrane, a dense, rounded nucleus and many bubble-like vacuoles. Amoeba constantly changes its shape and position. It pushes out one or more finger like projections, called pseudopodia or false feet for movement and capturing of food. Amoeba feeds on microscopic organisms. When it senses food, it pushes out pseudopodia around the food particle and engulfs it. The food becomes trapped in a food vacuole and digested by the digestive juices.

Please click the link below to download Class 7 Nutrition in Animals Notes for exams.

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Science Class 7 Exam Resources: Chapter 02 Nutrition in Animals

Essential Notes for Class 7 Science

Explore essential learning tools for Class 7 Science Chapter 02 Nutrition in Animals. This curated collection features in-depth notes and targeted practice questions built around the active 2026 curriculum to streamline your daily revision.

Verified Solutions for Class 7 Science

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FAQs

What is included in the advanced study material for Class 7 Science Chapter 02 Nutrition in Animals?

Our advanced study package for Chapter 02 Nutrition in Animals includes detailed concepts, diagrams, Mind Maps, and explanation of complex topics to ensure Class 7 students learn as per syllabus for 2026 exams.

How do Mind Maps for Science Chapter 02 Nutrition in Animals help in revision?

The Mind Maps provided for Chapter 02 Nutrition in Animals act as visual anchors which will help faster recall during high-pressure exams.

Are these Science resources suitable for both classroom teaching and self-study?

Yes, teachers use our Class 7 Science resources for lesson planning as they are in simple language and have lot of solved examples.

Is this advanced study material for Chapter 02 Nutrition in Animals free to download in PDF?

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Does this material cover rationalized content for the 2026-27 CBSE session?

Yes, our subject matter experts have updated the Chapter 02 Nutrition in Animals material to align with the rationalized NCERT textbooks and have removed deleted topics and added new competency-based questions.