implantation fossa

• 植入窝

implantation fossa的用法和样例：

例句

1. It had no acrosome and at its caudal end the nucleus had an implantation fossa.The nucleus consisted of electron dense chromatin materials and contained irregularly netlike gap.
   核前端无顶体，后端有植入窝，核中染色质致密，存在着不规则的网络状间隙。