Final answer:
The greater vestibular (Bartholin's) glands open at the vestibule, while the lesser vestibular (Skene's) glands open near the urethral meatus.
Step-by-step explanation:
The greater vestibular glands are located on either side of the vaginal opening in the vestibule, and they secrete mucus to lubricate the vulva during sexual arousal. Their ducts open into the vestibule.
On the other hand, the lesser vestibular glands, also known as Skene's glands, are located near the urethral meatus. These glands are responsible for secreting a small amount of fluid that may contribute to lubrication. The ducts of Skene's glands open into the urethra. Both sets of glands play roles in the female reproductive system and sexual function.