Skip to main content
ARS Home » Office of Communications » Images » Photos » Mar02 » k9825-1


300 dpi: (k9825-1.jpg)
640 pixels wide: (k9825-1.jpg)

Image Number K9825-1

As part of a study on selenium's effects, phlebotomist Evelyn Holguin draws a blood sample from a volunteer. Study participants provide samples about every 6 weeks for biochemical, genetic, and immunological analysis.

Photo by Peggy Greb.






Please visit our Image Gallery