"Illu pulmonary circuit". Licensed under Public Domain via Wikimedia Commons.
© 2018 Mikkel Kristiansen.
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"Circulatory System no tags" by LadyofHats - This is a unlabeled version of File:Circulatory System en.svg the sources from it are: Did myself based in the information and diagrams found in: "gray's anatomy" thirty sixth edition by Williams & Warwick. "Sobotta Atlas der Anatomie des menschen" volume 1 and 2 18.Auflage by Urban & Schwarzenberg "Atlas fotografico de anatomia del cuerpo humano" 3a edicion by Yokochi, Rohen & Weinreb multiple websites included:[1], [2], [3], [4], [5], [6], and others.. Licensed under Public Domain via Wikimedia Commons.
"SEM blood cells" by Bruce Wetzel (photographer). Harry Schaefer (photographer) - Image and description: National Cancer Institute. Licensed under Public Domain via Wikimedia Commons.