diapedesis
/ˌdʌɪəpəˈdiːsɪs
/noun [mass noun] Medicine
The passage of blood cells through the intact walls of the capillaries, typically accompanying inflammation.In 1870, Woodward observed a photomicrograph from the stomach of a mare with gastroenteritis demonstrating a white blood cell undergoing diapedesis from a small vein....
- These events contribute to leukocyte diapedesis across the endothelial monolayer and tissue inflammation.
- Based on his studies of a frog's tongue, Waller made important observations on diapedesis of leukocytes and reported that pus originated from ‘the colourless of spherical corpuscles from the capillaries.’
Origin
Early 17th century: modern Latin, based on Greek dia 'through' + pēdan 'throb or leap'.