The Human Gas Exchange System and Breathing - FREE KS3 Biology Worksheet

Find out how air travels from your nose to your lungs in this free KS3 Biology worksheet — no preparation needed, just download and use. Perfect as a lesson starter, homework task, or quick revision activity for students aged 11-14.

The gas exchange system is the group of organs that work together so you can breathe. It is also called the respiratory system.

✏️ Three questions worth 13 marks: a multiple choice question on the proper name for the windpipe, a five-gap word bank task on the route air takes into the lungs, and a six-mark written task explaining why the heart is not part of the system. A full answer key is included. Comes as a PDF and an editable Word file (DOCX).

🖥️ Full lesson page with the video, quiz and free worksheet: https://inewittall.com/ks3-biology/the-human-gas-exchange-system-and-breathing/?utm_source=payhip&utm_medium=listing

▶️ Watch the full lesson on YouTube: https://youtu.be/tj1iZkWPUW8

📚 Want more? The full 100-mark premium worksheet goes deeper into the diaphragm and intercostal muscles, how pressure and volume move air in and out, and the bell jar model. A complete lesson bundle with the extension pack is also available.

free worksheet

KS3 Biology

KS3 Science

gas exchange system

respiratory system

breathing

lungs

trachea

alveoli

bronchi

starter activity

homework