This clear and highly visual study resource features a detailed, fully annotated diagram of the nephron tailored specifically for AQA A-Level Biology Unit 5 (Control in cells and in organisms). Designed to simplify one of the most complex structures in the syllabus, this document provides a step-by-step breakdown of how the kidney regulates the body's internal environment. The diagram explicitly labels and explains the precise homeostatic mechanisms occurring at each section: ultrafiltration ...