Unformatted text preview: Figure 2–7 Major cerebral arteries and the circle of Willis. (Reproduced from [Marieb 1991]). Blood supply to the brain Figure 2–7 shows an overview of the arterial system supplying the brain. The major arteries are the vertebral and internal carotid arteries . The two posterior and single anterior communicating arteries form the circle of Willis , which equalises blood pressures in the brain’s anterior and posterior regions, and protects the brain from damage should one of the arteries become occluded. However, there is little communication between smaller arteries on the brain’s surface. Hence occlusion of these arteries usually results in localised tissue damage....
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- Fall '10
- Anthropology, Blood vessel, carotid arteries, internal carotid arteries, Major cerebral arteries