Final answer:
The uterus and the vulva are two anatomical structures present in female pigs but not in males; the uterus is for piglet development, and the vulva comprises external genitalia like labia majora and minora.
Step-by-step explanation:
Two anatomical structures that are present in female pigs but not in males are the uterus and the vulva. The uterus is part of the internal reproductive system, where the development of piglets takes place, and the vulva is part of the external reproductive system, which includes structures such as the labia majora and labia minora, the mons pubis, and the vestibular glands.
These structures are uniquely feminine, as they are involved in reproductive processes such as mating, fertilization, and parturition (giving birth).