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Formula Sheet

Digestive System — Formula Sheet

ICSE · Class 9 · Biology

8 formulas from Digestive System (ICSE Class 9 Biology) on one page, grouped by topic. Part of the ICSE Class 9 Biology syllabus.

45 questions40 flashcards8 formulas & key relations5 concepts

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A comprehensive labeled diagram of the human alimentary canal and its associated digestive glands, showing the path of food.
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8 Entries · 4 Sections

Formulas and Key Relations

Teeth and Dentition

Human dental formula (child): 2,1,2,0 / 2,1,2,0 = 20

Human dental formula (adolescent): 2,1,2,2 / 2,1,2,2 = 28

Human dental formula (adult): 2,1,2,3 / 2,1,2,3 = 32

Saliva and Swallowing

Starch --(Ptyalin)--> Maltose

Stomach

Pepsinogen (inactive) --HCl--> Pepsin (active); Pepsin + Proteins --> Peptides

Prorennin (inactive) --> Rennin (active); Milk Protein/casein --Rennin--> Paracasein

Milk teeth = 20.

Permanent teeth in adult = 32.

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Frequently Asked Questions

What are the important topics in Digestive System for ICSE Class 9 Biology?
Key topics in Digestive System include Digestive System and Alimentary Canal, Teeth and Dentition, Saliva and Salivary Glands, Swallowing, Peristalsis, and Oesophagus. Study these first, then practise questions on each for Class 9 exams.
How many formulas are in Digestive System?
This sheet lists 8 formulas from Digestive System, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Digestive System for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Digestive System. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Digestive System

All ICSE Class 9 Biology Formula Sheet

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