Blood squirt

[3] This is more commonly called "Allen's test" by microvascular surgeons, and is used before harvesting radial artery based free tissue transfers.

Saint Miliau, a Christian martyr killed c. 6th century AD, is sometimes represented holding his severed head, as in the retable of the Passion of the Christ at Lampaul-Guimiliau, where blood gushes from his neck.

Some animals deliberately autohaemorrhage or squirt blood (or an analogous bodily fluid) as a defense mechanism.

Armored crickets, which are native to Namibia, South Africa, and Botswana, drive away predators by spewing vomit and spurting hemolymph (the mollusk and arthropod equivalent of blood) from under their legs and through slits in their exoskeleton.

[5] One of the oriental rat flea mouth's two functions is to squirt partly digested blood into a bite.