ICSE Class 9 Biology Chapter 14 Revision Notes The Respiratory System

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ICSE Class 9 Biology Chapter 14 Revision Notes: The Respiratory System

 

ICSE Class 9 Biology Chapter 14 Revision Notes are one of the most important pieces of study material that students can receive as it will aid them to study better and reduce the level of stress that students face during the hectic year.

Swiflearn provides Revision Notes and keynotes chapter wise for the ICSE board exam in an easy-to-understand, free downloadable PDF format so students can use it for their studies and score better in their board exams. The ICSE Class 9 Revision Notes are made for the main subjects of Science and Maths. These core subjects are very critical as they are the stepping stones and plays a crucial role in student’s future. They might be tricky for students. The ICSE Class 9 Biology Revision Notes for each chapter will enable them to have an expert studying pattern with which they can enjoy learning the subject and perform better in the exams.

ICSE Class 9 Biology Chapter 14 Revision Notes are designed keeping in my mind the exam pattern and syllabus of NCERT 2020-21. Students can download the PDF for free and practice the questions to score well in the coming exams.

ICSE Class 9 Biology Chapter 14 Revision Notes: The Respiratory System

 

Respiration:
The process which helps in releasing of energy from cells of the body is respiration. It is a catabolic process.

The two types of respiration are:

Aerobic Respiration:

  • The breakdown of glucose in the presence of oxygen is called aerobic respiration.
  • This reaction occurs in mitochondria found in the cell cytoplasm and energy is
    released during this reaction.
  • Pyruvic acid is converted into carbon dioxide. Energy is released and a water
    molecule is also formed at the end of this process.
  • Glucose + Oxygen → Carbon dioxide + Water (+ Energy)
  • Aerobic respiration releases more energy per glucose molecule than anaerobic
    respiration does.

Anaerobic Respiration:

  • The breakdown of glucose in the absence of oxygen is called anaerobic
    respiration. Lactic acid is formed during this reaction.
  • Anaerobic respiration also occurs in microorganisms such as yeast and some
    bacteria.
  • Pyruvic acid is either converted into ethyl alcohol or lactic acid along with carbon dioxide.

 

The Respiratory System

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