Biology · GCSE · Human Body Systems

The endocrine system

The endocrine systemFree8:59Heddy Score 3 of 7, below the standard
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What you need to know

  • Endocrine glands release hormones into the blood, whereas exocrine glands release their secretions through a duct.
  • A hormone only affects target cells that carry a matching receptor.
  • The lesson tours the major endocrine glands and gives an example of a hormone from each.
  • Nervous messages use neurotransmitters and act faster, while hormones travel in the blood and tend to last longer.
  • Hypothyroidism is used to show what happens when an endocrine gland does not work as it should.

In this clip

Runs 8:59, from 0:00 to 8:59 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

2.56M views · 35.4K likes · Amoeba Sisters 2.98M subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

A clear tour of the glands and how hormones differ from nerve messages, which is the heart of this topic.

Amoeba Sisters on YouTubechecked 2026-10-18

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