Breathing and Exchange of Gases — Formula Sheet
ICSE · Class 11 · Biology
4 formulas from Breathing and Exchange of Gases (ICSE Class 11 Biology) on one page, grouped by topic. Part of the ICSE Class 11 Biology syllabus.
Interactive on Super Tutor
Studying Breathing and Exchange of Gases? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for formula sheet and more.
Free trial, no card needed.

One of 12 illustrations for Breathing and Exchange of Gases in Super Tutor — alongside flashcards, concept maps and practice questions.
Formulas and Key Relations
Exchange and Transport of Gases
Hb + 4O2 → Hb(O2)4
Hb(O2)4 → Hb + 4O2
CO2 + H2O ⇌ H2CO3
H2O + CO2 --carbonic anhydrase--> H2CO3 ⇌ H+ + HCO3-
Full sheet with units and worked examples
View AllFrequently Asked Questions
What are the important topics in Breathing and Exchange of Gases for ICSE Class 11 Biology?
How many formulas are in Breathing and Exchange of Gases?
How should I revise Breathing and Exchange of Gases for Class 11 exams?
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Breathing and Exchange of Gases
Practice Quiz
Test yourself with a quick quiz
Important Questions
Exam-style questions with answers
Revision Notes
Key points for last-minute revision
Chapter Summary
Understand the chapter at a glance
Concept Maps
See how topics connect
Study Plan
Step-by-step plan for this chapter
Flashcards
Quick-fire cards for active recall
Syllabus
What topics to cover
For serious students
Get the full Breathing and Exchange of Gases chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 11 Biology. Free to start, no card needed.