The ABO Blood Groups
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Human blood is classified into four ABO groups: A, B, AB, and O.
Show
A person with group AB blood carries both A and B markers on their red cells.
Watch for
The ABO group is recorded together with a separate positive or negative factor.
Builds on
Unlocks
- Nothing yet depends on this.