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Dural venous sinuses and internal carotid artery passing through the cavernous sinus

Dural venous sinuses (blue); internal carotid artery (red). (Source: Sobotta J, McMurrich JP. Atlas and Text-book of Human Anatomy. Volume III. Vascular System, Lymphatic system, Nervous system, and Sense Organs. Philadelphia: W.B. Saunders, 1908. Public domain. Edited by Dr. Douglas J Lanska.)