Blood From Water

Blood From Water
Behold Dorothy Sturm’s awesome photomicrographs watercolor illustrations of how different blood cells differentiate.
This classic work of science illustration was featured in the classic text The Morphology of Human Blood Cells by Lemuel Diggs, first published in 1956, and remaining a go-to text for pathologists for nearly half a century.

Source and further reading:
http://www.codex99.com/anatomy/104.html

References:
http://en.wikipedia.org/wiki/Haematopoiesis
http://library.uthsc.edu/history/dorothysturmexhibit/