Araceae (not to be confused with Arecaceae) is a family of monocots in which the flowers are borne on a spadix, with female flowers at the bottom and male flowers at the top, enclosed in a spathe. It includes the calla[?] and the largest flower in the world, Amorphophallus titanum. The taro (Colocasia esculenta) is also in this family.
... and the vaginal opening.
In the human male, the urethra is about 8 inches (200 mm) long and opens at the end of the penis.
Medical problems of the urethra:
...