Mucus Definition, Purpose & Causes Lesson Study.com The fluid that lubricates the vagina during sexual arousal is produced by the Meyer and Croper glands. Quipoquiz Vaginal discharge is a mixture of fluid comprising bacteria, mucus (liquid) and dead cells secreted by the cervix and vagina to protect the vagina by maintaining the PH, lubricating it, moistening, and Distinguishing Between Vaginal Discharge, Arousal Fluid, & Cervical Mucus Have you ever questioned what the white vaginal secret is made of (*secretion, I was corrected, but too late to edit it in the post :) )? It's 100% epithelium cells. Originally Vagina: Anatomy, Function, Conditions & Care