Notes for Edexcel IGCSE Human Biology (9-1)Watch
I sat for my Human Biology exam last year and I got a 9. I've attached the original document. I would post the PDF version but it's too large to be attached. Hopefully, if you find any mistakes or missing information, you can edit it and post it again for others to see. The stuff in bold are model answers. The document isn't perfect but hopefully it works to your advantage. I studied Human Biology on my own and did my exam completely based on this note.
Good luck and feel free to ask any questions. Tip: Do every single past paper. There's a lot of questions repeated across papers and it's ideal to form model answers for these questions.