Day: May 1, 2025

Question Paper: Human Respiratory & Circulatory Systems | Class 5th

Total Marks: 50 Time: 1 Hour 30 Minutes Instructions: Answer all questions in Sections A and B. Choose any two questions from Section C. Write neatly and use scientific terms where possible. Marks Allocation: Section A: 1 mark per question (10 total). Section B: Marks as indicated per

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Class 5th – Notes on Human Respiratory and Circulatory Systems

1. Human Respiratory System and Its Organs The respiratory system facilitates gas exchange (O₂ in, CO₂ out). Key organs: A. Main Organs Organ Function Nose Air enters; hairs filter dust. Windpipe (Trachea) Tube carrying air to lungs. Bronchi Two branches leading to each lung. Lungs Spongy