From the case:
Lingual vein
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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,
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