Final answer:
Bartholin's glands, also known as the greater vestibular glands, are responsible for secreting mucus that lubricates the female vulva area.
Step-by-step explanation:
The glands in question are called Bartholin's glands, also known as the greater vestibular glands. They are located on either side of the female urethra, near the vaginal opening. Bartholin's glands produce a thick mucus that helps maintain moisture in the vulva area and lubricates the opening to facilitate urination and sexual intercourse. Although the question mentions the urethra which could cause some confusion, it is important to clarify that in females, the Bartholin's glands are associated with the vagina and not directly with the urethra as in males with the bulbourethral glands (Cowper's glands) which have a different function and location.