Imagine calling one chromosome the 'urogenital chromosome, ' or the 'liver chromosome.

想象一下，将一条染色体称为“泌尿生殖染色体”或“肝脏染色体”。

Additionally, there's an external sphincter, at the level of the urogenital diaphragm in the floor of the pelvis which is under voluntary control.

此外，也存在尿道外括约肌，位于盆底的尿生殖膈，受意识支配。