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The image is a page from an anatomy textbook. It features two diagrams and accompanying text. The first diagram, labeled Figure 5:26, shows a lateral view of a human skull and cervical vertebrae, with a focus on the vertebral artery and subclavian artery. The vertebral artery is colored pink and originates from the subclavian artery. The second diagram, labeled Figure 5:27, illustrates the venous system of the left side of the head and neck. It shows various veins, including the internal jugular vein, external jugular vein, lingual vein, pharyngeal vein, and superficial veins of the face and temporal region. The text discusses the arterial supply to the brain, specifically the formation of the basilar artery from the vertebral arteries and its branches, including the posterior communicating and posterior cerebral arteries. It also describes the venous return from the head and neck, detailing the role of the external jugular vein. The text also mentions "The venous sinuses of the brain (Figs. 5:28 and 5:29)" and states that their walls are formed by layers of dura mater lined with endothelium. Figure 5:28, a portion of which is visible, shows a cross-section of the brain's venous sinuses, including the superior sagittal sinus, straight sinus, and transverse sinus. The image does not contain any information or visual elements related to the city of Jalingo, Nigeria.
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