Main Menu
  • School
    • Close
    • CBSE English Medium
    • CBSE Hindi Medium
    • UP Board
    • Bihar Board
    • Maharashtra Board
    • MP Board
    • Close
  • English
    • Close
    • English Grammar for School
    • Basic English Grammar
    • Basic English Speaking
    • English Vocabulary
    • English Idioms & Phrases
    • Personality Enhancement
    • Interview Skills
    • Close
  • Sarkari Exam Prep
    • Close
    • All Govt Exams Preparation
    • MCQs for Competitive Exams
    • Notes For Competitive Exams
    • NCERT Syllabus for Competitive Exam
    • Close
  • Study Abroad
    • Close
    • Study in Australia
    • Study in Canada
    • Study in UK
    • Study in Germany
    • Study in USA
    • Close
Science Class 7 || Menu
  • Videos Science Class 7
  • MCQ Science Class 7
  • Notes Science Class 7
  • Question Answer Science Class 7
  • Important Questions Science Class 7
  • Sample Paper Science Class 7
  • Previous Year Paper Science Class 7
  • Book Science Class 7
  • Nutrition in Plants
  • Nutrition in Animals
  • Heat
  • Acids, Bases and Salts
  • Physical and Chemical Changes
  • Respiration in Organisms
  • Transportation in Animals and Plants
  • Reproduction in Plants
  • Motion and Time
  • Light
  • Science Class 7

Notes Class 7 Science Chapter 6 Respiration in Organisms

Advertisement

Notes For All Chapters Science Class 7

Study Material and Notes of Ch 6 Respiration in Organisms Class 7th Science

Topics in the chapter

Cellular Respiration
Types of Respiration
Breathing and Exchange of Gases
Respiration in Plants
Respiration in Microorganisms
Respiration in Aquatic animals

Cellular Respiration

→ It is the process in which food is broken down in the cell to release energy.

→ It occurs in the cells of all living organisms.

Two types of Respiration

(i) Aerobic respiration

It is the process of breakdown of food in the presence of oxygen.
It occurs in all organisms.
It leads to production of carbon dioxide, water, and energy.

(ii) Anaerobic respiration

→ It is the process of breakdown of food in the absence of oxygen.
Yeast, bacteria, human muscle cells, etc. respire anaerobically.

→ In yeast cells, anaerobic respiration leads to production of alcohol and carbon dioxide.

→ During heavy exercise, our muscles respire anaerobically to provide energy to muscle cells.

→ This leads to accumulation of lactic acid that causes muscle cramps and thus, pain in body.

Breathing and Exchange of Gases (Respiration)

→ Respiration is the process of release of energy from the breakdown of organic substances.

→ It involves the exchange of oxygen from atmosphere and carbon dioxide produced in the body.

→ The breathing involves two processes: Inhalation and exhalation.

Inhalation

→ During inhalation, the diaphragm moves down and the ribs move upwards and outwards, thereby increasing the space in the chest cavity. This leads to the movement of air inside the lungs.

Exhalation

→ During exhalation, the diaphragm moves to its former position and the ribs move downwards and inwards, thereby reducing the size of the chest cavity.

→ This leads to the movement of air out of the lungs.

Respiration in Plants

→ Plants respire through tiny pores present on their leaves surface called stomata.

→ Oxygen enters the plant, while carbon dioxide leaves the plant through these pores.

→ Roots of plants respire through air spaces present in the soil.

Respiration

→ All living organisms require a continuous supply of energy for carrying out various life activities.

→ Cellular respiration is the process of releasing energy from the breakdown of organic substances.

→ The released energy is stored in the form of ATP.

→ ATP is the energy currency of cell.

→ The process of cellular respiration occurs in cytoplasm and mitochondria.

→ It involves the consumption of oxygen and liberation of CO2 and water.

→ The equation of respiration is

C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy

Respiration in microorganisms

→ Amoeba respires through surface of the skin by the process known as diffusion.

→ Respiration in land animals

→ A cockroach has small openings on the sides of its body, which are known as spiracles.

→ The oxygen rich-air enters through spiracles.

→ The spiracles are connected to a network of tubes, called tracheae, for gaseous exchange.

→ Earthworms breathe through the surface of their moist skin.

→ In animals like cows, dog, buffaloes and cats, the respiratory organs and the process of breathing are similar to those in human.

Respiration in aquatic animals

→ Frogs respire through both lungs and their skin.

→ Fish have special structure called gills for breathing.

NCERT Solutions of Respiration in Organisms Class 7

Comments

  1. Divya says:
    April 5, 2025 at 11:55 am

    My notes

    Reply
  2. Bhavik bansal says:
    October 8, 2024 at 2:34 pm

    Thank you didi you let me to understand this chapter,I think that you are the best Science teacher for class 7

    Thank you
    Mansi didi

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Advertisement

CBSE Delhi Question Answer of Chapters in PDF

Free Sample Papers and Previous Years' Question Papers for CBSE Exams from the Official CBSE Academic Website (CBSE.nic.in) in Delhi, Rajasthan, Uttar Pradesh and Bihar

Download CBSE / NCERT Book, Notes & MCQ Online Test / Mock Test

Online Quiz with Answers for Objective Questions in Hindi and English

Advertisement

Maharashtra Board Marathi & English Medium

Just Launched! Access Maharashtra Board Exam MCQs, Previous Year Papers, Textbooks, Solutions, Notes, Important Questions, and Summaries—available in both Marathi and English mediums—all in one place Maharashtra Board

Android APP

सरकारी Exam Preparation

Sarkari Exam Preparation Youtube

CBSE – दिल्ली, उत्तर प्रदेश, मध्य प्रदेश, बिहार, राजस्थान & हरियाणा Board हिंदी माध्यम

कक्षा 6 to 8 हिंदी माध्यम
कक्षा 9 & 10 हिंदी माध्यम
कक्षा 11 हिंदी माध्यम

State Board

यूपी बोर्ड 6,7 & 8
बिहार बोर्ड हिंदी माध्यम

CBSE Board

Mathematics Class 6
Science Class 6
Social Science Class 6
हिन्दी Class 6
सामाजिक विज्ञान कक्षा 6
विज्ञान कक्षा 6

Mathematics Class 7
Science Class 7
SST Class 7
सामाजिक विज्ञान कक्षा 7
हिन्दी Class 7

Mathematics Class 8
Science Class 8
Social Science Class 8
हिन्दी Class 8

Mathematics Class 9
Science Class 9
English Class 9

Mathematics Class 10
SST Class 10
English Class 10

Mathematics Class XI
Chemistry Class XI
Accountancy Class 11

Accountancy Class 12
Mathematics Class 12

Learn English
English Through हिन्दी
Job Interview Skills
English Grammar
हिंदी व्याकरण - Vyakaran
Microsoft Word
Microsoft PowerPoint
Adobe PhotoShop
Adobe Illustrator
Learn German
Learn French
IIT JEE
Privacy Policies, Terms and Conditions, About Us, Contact Us
Copyright © 2025 eVidyarthi and its licensors. All Rights Reserved.