From the case:
Lingual vein
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_examine_pipeline_reports":false,"can_pin":false},"extraPropsURL":"/studies/72191/annotated_viewer_json?lang=us"}
Gray's anatomy diagram illustrating the lingual vein.
This image is in the public domain. Original source: https://commons.wikimedia.org/w/index.php?curid=522464
By Henry Vandyke Carter - Henry Gray (1918) Anatomy of the Human Body (See "Book" section below) Bartleby.com: Gray's Anatomy, Plate 559, Public Domain,