This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
PSM Circulation of the spider mygale blondii. Circulation of the Spider Mygale Blondii Fig The stomach with its cca and the remainder of the alimentary canal with the liver and Malpighian tubes Fig Heart and arterial vessels archive org Popular Science Monthly Volume Author PDold Popular Science Monthly illustrations Spider