Translations:Circulatory system/46/en: Difference between revisions
Jump to navigation
Jump to search
Importing a new version from external source |
(No difference)
|
Latest revision as of 17:10, 19 October 2023
The blood vascular system first appeared probably in an ancestor of the triploblasts over 600 million years ago, overcoming the time-distance constraints of diffusion, while endothelium evolved in an ancestral vertebrate some 540–510 million years ago.