NCERT Solutions for Class 7 Science Chapter 2: Nutrition in Animals

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NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals are provided in this article. It includes all the important definitions, concepts, and methodologies that will be really beneficial for the students. The important topics that are included in this chapter are:

Download PDF: NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals

NCERT Solutions for Class 7 Science Chapter 2

NCERT Solutions for Class 7 Science Chapter 2 Nutrition in Animals are provided in the PDF:

Check out: Concept Notes on Nutrition in Animals

Class 7 Science Chapter 2 Nutrition in Animals: Important Topics

Nutrition is the process of obtaining food and then using it for obtaining energy, growth, and repair of the body. There are five main processes concerned with the use of food by animals. As we know Plants produce their own food with the help of photosynthesis. But animals are heterotrophs and hence they depend on other organisms for their food.

Different Ways of Taking Food

Animal nutrition includes the nutrient requirements, the mode of food intake, as well as the utilization of food in the body. The intake of food is called ingestion.

The different ways of taking food by the organisms:

Humming Bird → Nectar → Sucking
Human Beings → Fruits, Vegetables → Mouth (Chewing and Swallowing)
Snakes → Rats → Swallowing
Frogs → Insects → Swallowing (Sticky Tongue)
Earthworm → Decaying Matter → Swallowing (Muscular Pharynx)
Spiders → Insects → Grinding
Amoeba → Tiny Food Particles → Engulfing (Pseudopodia)
Hydra → Insects and Fish → Tentacles
Bees → Nectar → Sucking
Snail → Grass → Chewing
Ants → Insects → Scraping

Digestion in Humans

The digestive system of the human body is composed of a group of organs working together to convert food into energy for the body. The digestive system, anatomically, is made up of the gastrointestinal tract, along with accessory organs like the liver, pancreas, and gallbladder. Digestion in humans involves the intake of food by an organism and its utilization for energy. This is a vital process that helps living beings to obtain their energy from various sources.

Digestion in Grass-Eating Animals

The grass-eating animals have cellulose-digesting bacteria present in their stomach helping to digest cellulose. They quickly swallow the grass and store it in the rumen, where the food gets partially digested and is termed cud. Moreover, the cud returns to the mouth in small lumps and the animal chews it.

Chapter Related Links:

Digestion in Ruminants	MCQs on Animal Kingdom	Breathing in other animals
Nutrition in Human Beings	Food Deficiency	Life Processes
Autotrophic Nutrition	Human Digestive System	Circulatory system

Class 7 Science Additional Resources:

CBSE Class 7 Science NCERT Textbook	CBSE Class 7 Science Sample Paper	NCERT Solutions

CBSE X Related Questions

1.
How many bulbs of resistance \( 8 \ \Omega \) each should be connected in parallel combination to draw a current of \( 2 \text{ A} \) from a battery of \( 4 \text{ V} \) ?
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2.
When an element 'X' reacts with water, it starts floating. Identify the element 'X':
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- Calcium
- Sodium
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3.
Which structure in a leaf is mainly responsible for gaseous exchange?
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4.
Sex is determined by different factors in various species. However, in human beings, it is determined genetically. Which amongst the following option(s) is/are correct for human beings ?
Gamete carrying X chromosome from female parent.
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Gamete carrying Y chromosome from male parent.
- (ii) and (iii)
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5.
(a) Study the given electric circuit in which 2 A electric current is flowing between points X and Y.

(i) Using the battery, key, voltmeter and ammeter in this given electric circuit, redraw a circuit diagram in which 2 \(\Omega\) and 4 \(\Omega\) resistors are connected between X and Y in parallel combination.
(ii) Circuit drawn by you, in which resistors are connected in parallel combination, calculate the electric current flowing through 4 \(\Omega\) resistor.
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