Hormones travel in blood
Hormones travel in blood
The endocrine system is a group of glands that coordinates body processes by secreting hormones directly into the blood. Unlike an exocrine gland, an endocrine gland has no duct.
Step-by-step lessons on OCR GCSE Biology 3.2 Coordination and control – the endocrine system, covering 3.2.1 Principles of hormonal coordination and control, 3.2.2 Roles of thyroxine and adrenaline, 3.2.3 Hormones in human reproduction, 3.2.4 Interactions of reproductive hormones, 3.2.5 Hormones in contraception, 3.2.6 Hormones in reproductive technologies, 3.2.7 Plant hormones in growth and coordination, 3.2.8 Effects of plant hormones, and 3.2.9 Uses of plant hormones. Each one builds up to exam-style questions. Start with the foundational topics and build up to the higher-tier material.