Looking like exactly what it is, at least as a metaphor, a complex and busy transportation system, this image reveals the complexity of the blood supply moving towards and away from a single oviduct inside a mouse.
The picture was taken by Amanda Phillips Yzaguirre of the Salk Institute for Biological Studies in California, US, and was among the prize-winners in the 2018 Nikon Small World photomicrography competition.
The competition attracted 2500 entries from 89 countries. More of them can be seen at Nikon Small Worlds website.
Originally published by Cosmos as Deep inside a mouse
Cosmos
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