hilum of spleen

例句：

1. 1. The surgeon removed the hilum of the spleen during the surgery.
   外科医生在手术中切除了脾脏的血管部分。
2. 2. The patient's blood tests showed that the hilum of the spleen was enlarged.
   患者的血液测试显示脾脏的血管部分肿大。
3. 3. The hilum of the spleen is a vital part of the immune system.
   脾脏的血管部分是免疫系统的重要组成部分。