identity
These are synthetic blood samples. We filled these trays with drops of synthetic blood, then added Anti-A, Anti-B, and Anti-Rh (positive) solutions. From the top down, the solutions are O+, O-, B+, and A+.
close-ups
This is a sample of lemur blood viewed through a microscope. The brown-red spots are red blood cells, and the white blotches are white blood cells, or leukocytes. The picture below is a sample of human blood.