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What are the blood types?
Everyone has a blood type. There are four main types: A, B, AB and O. The letter tells which markers sit on your red blood cells: A, B, both, or none. A second marker adds a plus if you have it and a minus if you don't, which makes eight types.
Donated blood must match. O minus fits almost anyone, so hospitals keep it ready. Your type comes from your parents, and it's worth knowing. Next: what is the rarest blood type?
About this film
A 25-second vertical (9:16) explainer film, made in the Mid-century cartoon style, published on 22 October 2026.
A friendly tomato blood drop shows that a blood type is a badge of tiny markers on your red cells: a letter for which markers, a plus or minus for one more — and why donated blood must match.
The style: Mid-century cartoon. 1950s limited animation: sparse, witty, off-register colour.
Scene by scene
- 0:00Hook: what are the blood types?
- 0:02Four main types: A, B, AB, O
- 0:05The letter = which markers sit on the red cell
- 0:08Plus = a second marker; minus = none. Eight types
- 0:12Donated blood must match; O minus is kept ready
- 0:17Your type comes from your parents
- 0:20End card: next film, the rarest blood type
Transcript
What are the blood types? Everyone has one. Four main types: A, B, AB, O. Letters show red blood cell markers: A, B, both, or none. Plus has a second marker; minus doesn't. Eight types. Donated blood must match. O minus fits almost anyone; hospitals keep it ready. Your type comes from your parents, and it's worth knowing.
Next: what is the rarest blood type? Follow for more explainers, or make your own at explain.film.
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