Lesson 1 ·Class 9 · The Respiratory System · Sort Lab
Breathing and Respiration
Two words people use interchangeably, wrongly.
Sort each statement into the process it describes.
Sorted 0/10
All items sorted — check each bin.
VS
Free play — sort every item into the bin it belongs in; each correct drop tells you why. Switch to when you're ready to test yourself.
Breathing supplies the raw material; respiration does the work. You can hold your breath, but you cannot hold your respiration.
What this lesson covers
Challenges to clear
- Sort every statement.
- Fill the Cellular respiration column — what happens inside the cell, not the chest.
The task
Sort each statement into the process it describes.
What this lesson covers
- Breathing — A physical process: A purely physical process (Air moving in and out — no chemical change occurs.); Takes place in the lungs (An organ-level event.); Releases no energy itself (It merely supplies the oxygen that the real process needs.); Can be consciously controlled for a while (You can hold your breath — but not indefinitely.); Requires no enzymes (Only muscles and pressure differences are involved.)
- Cellular respiration — A chemical process: A chemical process involving many enzyme-controlled steps (Glucose is oxidised, step by step.); Takes place inside every living cell (Mainly in the mitochondria.); Releases energy and stores it as ATP (This is the whole purpose of the exercise.); Can never be stopped or controlled at all (If it stopped, the cell would die within minutes.); Requires a whole series of specific enzymes (Each step of the breakdown has its own.)
Hint
Breathing supplies the raw material; respiration does the work. You can hold your breath, but you cannot hold your respiration.