Objective to explain the size of hepatic veins cave of normal human body, its Orifice form and connected characteristics to provide morphological evidence for clinical diagnosis.
目的探讨正常人体肝静脉管腔大小、开口形态及其汇合特点，为临床诊治相关疾病提供形态学依据。
It can effectively expand the velopharyngeal orifice area ventilation, to maintain the tension soft palate and the normal function of pharynx mucosa.
并可有效地扩大腭咽腔的通气面积，保持软腭的紧张度及咽黏膜的正常功能。
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