The Endocrine System
The Endocrine System

The body coordinates complex, long-term processes using the endocrine system. This system consists of glands that secrete chemical messengers called hormones directly into the bloodstream.
Step-by-step lessons covering Edexcel GCSE Biology 7.1 Hormones and coordination for Foundation and Higher tier. Each lesson breaks down 7.1.1 Endocrine glands and hormone transport, 7.1.2 Adrenalin and fight or flight, and 7.1.3 Thyroxine and negative feedback, then works through exam-style questions in Paper 1 and Paper 2 format. Start with the foundational topics and build up to the higher-tier material.