Final answer:
Bartholin's glands, or the greater vestibular glands, primarily function to provide lubrication for the vagina through the secretion of mucus, facilitating sexual intercourse and maintaining vulva moisture.
Step-by-step explanation:
The primary function of Bartholin's glands, also known as the greater vestibular glands, is to provide lubrication for the vagina. These glands produce a thick mucus that maintains moisture in the vulva area, which is essential for both the comfort and the health of the genital tissues. Moreover, during sexual arousal, the lubrication secreted by Bartholin's glands facilitates sexual intercourse by reducing friction. This function is distinctly different from other glands in the body, such as the adrenal cortex which secretes hormones for stress response, or endocrine glands that often regulate growth and development through hormonal secretion.