Gas exchange AQA A level Biology

**Gas exchange in fish, insects and humans. **

Lessons with a focus on exam technique. Answers provided for all tasks.

Gas exchange in humans: PPT lesson with images and information to talk through. Hook starter question. Slide to print and label. Several slides on misconceptions/exam technique. Exam questions with answers. Plus a set of exam questions on gas exchange and ventilation (nb: ventilation not covered in this ppt)

Gas exchange in fish: A ppt lesson with information and diagrams on gill adaptations, countercurrent exchnage principle and questions/video to support gills dissection. hook question to start and end included. Answers provided throughout. Exam questions and mark scheme included. Gill diagrams to pint and label included.

Gas exchange in insects: Starts with a ‘hook’ question and a short video to watch with a question to answer. Diagram of insect to print for labelling as you talk through the structure of the respiratory system (or get them to find the info themselves). Some questions for them to answer and a mark scheme with the key phrases underlined to boost exam technique. An exam question to complete as an extension of for homework. Mark scheme included.