Right: Vaginal lubrication sometimes becomes visible after sexual arousal. Vaginal lubrication is a naturally produced fluid that lubricates a woman's vagina. Vaginal lubrication is always present, but production increases significantly near ovulation and during sexual arousal in anticipation of sexual intercourse.
Marie Iannotti. Definition: A basal leaf is one that grows from the lowest part of the stem. Basal, in general, refers to the base of a structure. Many perennial plants are trimmed back to new basal foliage once the older foliage starts to look tired and worn.
Now that we have several flagella completed, we need to know how the flagella in prokaryotes operate. If you recall, the basal end of a flagellum is the flagellum's form of locomotion. Basically, the flagellum beats its basal end in a rotary movement. In one sense, the basal end can almost be thought of as a motor boat's propeller which allows the boat to move in the water.