正常的板障间隙被纤维结缔组织所替代，并伴有众多的血管沟。
The normal diploic space is replaced by fibrous connective tissue with numerous large vascular channels.
鼻唇沟真皮下血管网皮瓣血液循环可靠，再造鼻翼的臃肿程度大大减轻。
The nasal labial thin skin flap with subdermal vascular plexus has reliable blood supply, and it makes the bulky repaired ala become thinner.
再稍低一点的四腔心切面上我们可以看到房室沟处一条血管。
Lower at the level of the 4-chamber view, we could see a vessel in the atrioventricular groove.
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