papillary造句

1、The papillary muscles contract during systole to prevent regurgitation of blood into the atria.
肌在心脏收缩期收缩，以防血液回流入主动脉。

2、The lens is the main factor causing papillary block.
晶体是引起瞳孔阻滞的主要因素。

3、Papillary carcinomas are indolent tumors that have a long survival, even with metastases.
癌表现为无痛性肿块，存活时间长，甚至在转移的情况下也是如此。