This introduction covers The Story: The Postal Service within Human Endocrine System for GCSE Biology. Topic 4: Human Endocrine System It is section 1 of 11 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
The Story: The Postal Service
If the nervous system is like a phone call (instant but short), the hormonal system is like sending a letter. It takes longer to arrive, but the message lasts longer. Hormones are chemical messengers, released by glands into the blood, traveling to target organs where they trigger effects that can last hours, days, or even years.
Practice questions for Human Endocrine System
Which gland is known as the 'master gland' because it controls other endocrine glands?
Compare how the nervous system and the endocrine system coordinate responses in the body. [3 marks]