vasoganglion -
a *spherical* mass of small blood vessels
an *obsolete* term for a mass or aggregate of blood vessels
https://medical-dictionary.thefreedictionary.com/vasoganglion

Vlada, где вы это откопали?

Vascular/circulatory system - https://www.hopkinsmedicine.org/healthlibrary/conditions/cardiovascular_diseases/overview_of_the_vascular_system_85,P08254