taut (Gen. an. 717a.30–717b.5). Their function is to facilitate the drawing of semen downward so it can be ejected. Without them, the seminal channels draw up inside the body, and the male becomes unable to dispense semen into the female. The female is not given such weights but instead develops a hollow uterus and appropriate vessels to draw the semen upward (Gen. an. 739a.37–739b.20).32 Thus, testicles do not develop at puberty for females as they do for males. Long feminine hair assists the uterus