Hi,
Blood is a special connective tissue consisting of a fluid matrix, plasma,
and formed elements.
Their are four types of blood
1) A+ or A-
2) B+ or B-
3) AB+ or AB-
4) O+ or O-
These types are assigned on the basis of antigen present on the red blood cell.
Hope you like this information.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile