Sperm Enter the Cervical Canal Through the External

Question

Sperm enter the cervical canal through the external
A) isthmus.
B) ampulla.
C) fimbra.
D) os.
E) commissure.

Accepted Answer

The os is the opening of the cervix and is where sperm enter the cervical canal. The other choices are not the site of sperm entry into the cervical canal. The isthmus is the narrowed portion of the fallopian tube closest to the uterus, the ampulla is the widened portion of the fallopian tube where fertilization occurs, the fimbra are finger-like projections at the end of the fallopian tube that sweep the ovum into the tube, and the commissure refers to a junction between two structures.