Biology · KS3 Y8 · Health & Disease
Unicellular organisms
Unicellular organismsFree3:58Heddy Score 3 of 7, below the standard
What you need to know
- Single-celled organisms come in many shapes, sizes and colours, not just the classic amoeba.
- Stentors are large single cells that use beating hair-like cilia to sweep food in, and the food is digested inside the cell.
- Some single-celled organisms have algae living inside them: the algae get waste products and the cell gets oxygen.
- Rotifers are tiny multicellular animals, but they can be no bigger than some single cells.
In this clip
Runs 3:58, from 0:00 to 3:58 of the full video.
Heddy ScoreSeven checks every clip must pass before students see it: trusted, on the map, accurate, focused, accessible, safe, and proven by students.3/7, 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.
Our students
Not enough students yet
Our own students' answers. These are what move ★7 Proven.On YouTube
How the Heddy Score works1M views · 20.9K likes · My Microscopic World 40.7K subscribers
As reported by YouTube on 2026-11-02. Not part of the Heddy Score.Why we picked it
Real microscope footage from a pond drop that shows one cell feeding, moving and surviving on its own.
My Microscopic World on YouTubechecked 2026-10-22
Plays from youtube-nocookie.com. No YouTube cookies until you press play.