adventitia [ˌædvən'tɪʃɪr]

例句:

• Inadequate cell nutrition around vessels causes degeneration of tunica adventitia.
  血管周围细胞的营养不足,引起外膜的变性.
  
• The tunica adventitia of middle arteries was comprised of abundant elastic fibers.
  中动脉外膜内层结构致密,纤维组织丰富.
  
• A false aneurysm is the term applied when only the adventitia is present.
  假性动脉瘤一词用于只有一层动脉外膜的动脉瘤.