This collection can be purchased for your favorite medical/research person on a number of products in the store over at Society6.

Image depicts human lungs. One of them has been replaced with a bird wing, and the other is rendered in looping whorls where the brachioles would be, and the rest of the tissue is filled with paisley patterns. It is rendered in black-and-white with cross-hatching.
Taking the Air
Image shows a fantasy landscape of alveoli as trees being tended by lymphocyte tardigrade hybrid creatures in black-and-white crosshatching.
Alveoli Forest
Image depicts two kidneys wrapped together in a yin yang shape. One kidney is whole, and the other is a cross view of glomeruli and blood vessels.
Yin Yang Kidneys
Image depicts the villi of the intestine cut away at the front for an internal view of the cell types in the endothelium. The villi are being tended by fictional hybrid lymphocyte/tardigrade creatures. It is rendered in black-and-white crosshatching.
Intestinal Scene
Image depicts a view of female reproductive anatomy as flowers in a vase. The uterus is the vase. Fallopian tubes are the stems of two flowers leaning out of opposite sides. The fimbrae at the end of the stems are depicted as peonies. There are orbs floating beneath the peonies with decorative paisley based on the ovarian cycle.
Sipping: Ovaries in a Vase