Biology Igcse Course Unit 11
Published 6/2026
MP4 | Video: h264, 1920x1080 | Audio: AAC, 44.1 KHz, 2 Ch
Language: English | Duration: 1h 16m | Size: 1.73 GB
Gas Exchange in Humans
What you'll learn
In this course students will learn exactly what they need to know for their Biology IGCSE exams. Students will learn about
1. Describe the features of gas exchange surfaces in humans
2. Identify in diagrams and images the following parts of the breathing system
3. Investigate the differences in composition between inspired and expired air using limewater as a test for carbon dioxide
4. Describe the differences in composition between inspired and expired air, limited to: oxygen, carbon dioxide and water vapour
5. Investigate and describe the effects of physical activity on the rate and depth of breathing
6. Identify in diagrams and images the internal and external intercostal muscles
7. State the function of cartilage in the trachea
8. Explain the role of the ribs, the internal and external intercostal muscles and the diaphragm in producing volume and pressure changes in the thorax
9. Explain the differences in composition between inspired and expired air
10. Explain the link between physical activity and the rate and depth of breathing
11. Explain the role of goblet cells, mucus and ciliated cells in protecting the breathing system from pathogens and particles
Requirements
Access to a device to watch lessons - phone, tablet, or computer No textbook needed - everything is covered in the course
Description
This Biology course is structured specifically around the latest Cambridge IGCSE and GCE Biology syllabus, ensuring complete and accurate coverage of every objective students need to master for their examinations. Students preparing for AP Biology, IB Biology, or equivalent international curricula will also find this course highly valuable for building a thorough understanding of the theory component of their exams, as the core biological concepts covered are closely aligned across these specifications.
The course focuses on
Unit 11: Gas Exchange in Humans, a unit that is consistently examined across all papers and one where students who understand both the theory and the practical component in depth can score very highly. Every syllabus objective is covered in full, with zero gaps.
Every syllabus objective is covered comprehensively, without overloading you with irrelevant material. The content is precise, focused, and directly aligned with what examiners expect - so you spend your time learning exactly what matters and nothing that does not. Throughout every lesson, real past paper questions are used to show you how this unit is examined, what a full-mark answer looks like, and the common mistakes that cost students marks every single year. You will know not just what to say, but how to say it - and equally importantly, what not to write.
The course builds strong
exam technique alongside content knowledge, covering every question type across Papers 1, 2, 3 and 4 - from multiple choice and short answer to structured and extended response questions. Students leave this course knowing exactly how to approach any question on this unit regardless of how it is worded.
Every video lesson comes with a
downloadable PDF resource that contains everything you need to know for that specific lesson - definitions, diagrams, key points and exam tips - all written and structured to match exactly what the syllabus requires. There is no need to open a textbook, search for revision guides, or look anything up online. Simply watch the lesson, download the PDF, study from it, and go straight to past papers. Everything you need is right here in one place.
The
practical component is fully covered in this course. Students are taken through two core investigations - the investigation into the differences in composition between inspired and expired air using limewater, and the investigation into the effects of physical activity on the rate and depth of breathing. Both experiments are broken down in full - covering the method, variables, expected results, data interpretation and evaluation - with specific training on how to answer practical questions in
Papers 5 and 6 that test experimental skills, data analysis and scientific reasoning under exam conditions.
This course is ideal for students aiming for high achievement and A* grades in Biology examinations.
Who this course is for
IGCSE Biology Students Preparing for External Exams
Biology Igcse Course Unit 11
