GCSE Biology - The Endocrine System (2026/27 exams)

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** WHAT'S COVERED **
1. Introduction to the Endocrine System
Role as a communication system using hormones.
How hormones travel via the bloodstream to target cells with specific receptors.
2. The Main Glands of the Endocrine System
Pituitary gland (master gland) and its functions.
Thyroid gland, thyroxine, metabolism, and negative feedback (TSH).
Adrenal glands and adrenaline (fight-or-flight).
Pancreas and insulin (blood glucose regulation).
Ovaries (oestrogen, egg cells).
Testes (testosterone, sperm).
3. Comparison between the Endocrine and Nervous Systems
Differences in signalling (hormones vs electrical impulses).
Differences in speed and duration of effects.
Differences in specificity (general vs precise action).

** CHAPTERS **
0:00 Introduction
0:31 How the Endocrine System Works
1:29 Pituitary Gland
1:53 Thyroid Gland
2:47 Adrenal Glands
3:10 Pancreas
3:25 Testes & Ovaries
4:08 Endocrine vs Nervous System

** PLAYLISTS **
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