Paul Kerley in BBC News:
These colourful and intricate images are this year's Wellcome Image Awards finalists. From a greenfly's eye, to a curved human spine – they showcase the best in science imaging techniques. Below is the final selection of 20 – but which one will be named overall winner on Wednesday 18 March?
Featuring an intricate pattern, with an almost carpet-like appearance in places, this photo is of a stomach chamber in a goat.
It shows the goat's reticulum – the second of four stomach chambers found in cattle, sheep and goats.
The oesophagus – the tube that carries food from the mouth to the stomach – is seen at the top of the image.
The photo by Michael Frank is of a specimen now held at the Royal Veterinary College in London, that would have come from a culled animal.