现已上线！2025 年 Telegram 研究 — 年度关键洞察 
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Benign breast disease.pdf1.99 KB
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Diverticular Diseases .pdf2.35 KB
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Drugs in Obstetrics and Gynecology. Part 1.pdf2.72 MB
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Circulus arteriosus cerebri (Circle ⭕ of Willis)
The main components of the circle of Willis include:
1. Anterior cerebral arteries (ACAs) - Paired vessels arising from the internal carotid arteries (ICAs)
2. Anterior communicating artery (ACOM) - Single midline vessel connecting the ACAs
3. Internal carotid arteries (ICA) - Branches of the common carotid arteries
4. Posterior cerebral arteries (PCAs) - Paired vessels arising from the basilar artery (BA)
5. Posterior communicating (PCOM) arteries - Paired vessels connecting the ICAs and PCAs
