The Respiratory System
The Respiratory System
Should cover extensive details across depths
5 depths≈ 215 min of reading52 practice questions
The ladder
Choose how deep to go
Every depth is open. Start where it feels interesting — you can always move back.
- Discoverabout 41 minHow We Breathe: The Story of Air and BodyThis lesson explains how the human respiratory system moves air in and out, why oxygen matters for every cell, and how your diaphragm and ribs make breathing happen without you thinking. You will meet the parts of this airway highway and test your knowledge with everyday examples
- Understandabout 40 minEvery Breath You Take: How Your Respiratory System WorksThis lesson follows the path of air through the respiratory system, explains how oxygen enters the blood and carbon dioxide leaves it, and clears up common mix-ups with the circulatory system. It uses everyday Indian examples and simple models to build genuine understanding.
- Investigateabout 53 minAir and Energy: How Your Body Fuels MovementThis lesson follows air from nose to alveoli and shows how the diaphragm, ribs, and blood work together to trade oxygen for carbon dioxide. Learners change posture, breathing route, and activity level to predict, compare, and test how gas exchange meets the body's changing fuel n
- Go deeperabout 44 minBreathing Deep: How Your Lungs Really WorkThis lesson traces every breath from nose to blood, explains how muscles and pressure move air, and shows how to calculate what your lungs achieve each minute. It builds from familiar breathing sensations to the invisible gas-exchange membrane and real-life adjustments for exerci
- Extendabout 37 minBreathing Deep: How Lungs Run the Body's Oxygen BankThis lesson explores how the respiratory system harvests oxygen and expels carbon dioxide, from the mechanics of breathing to molecular exchange in alveoli. Learners examine how lungs adapt to exercise, altitude, and water, design experiments to test lung capacity, and trace how
Practise and apply
Question bank · 52 questions
2 sections from Foundation to Challenge, each with hints and a worked solution — or play a 10-question round for points and stars.
Foundation 14Core 18Stretch 12Challenge 8
Words to know
46 words are explained in these lessons
AlveoliBronchiBronchiolesCellular respirationDiaphragmDiffusionExternal intercostal musclesGas exchangeHemoglobinLarynxMucusPharynx+34 more