Final answer:
The supra-orbital ridge is a bony protrusion located above the eye sockets that varies in size between males and females. It is believed to play a role in protecting the eyes and providing structural support to the face.
Step-by-step explanation:
The supra-orbital ridge, also known as the brow ridge, is a bony protrusion located just above the eye sockets. It is formed by the frontal bone and varies in size among individuals, with males generally having larger brow ridges compared to females. The supraorbital ridge is believed to have played a role in protecting the eyes and providing structural support to the face.
Sex differences in the supraorbital ridge can be observed in various species, including humans, where the ridge is often more prominent in males. This sexual dimorphism may be attributed to factors such as testosterone levels and the overall size and shape of the skull.
In summary, the supraorbital ridge is a noticeable anatomical feature that differs in size between males and females. It is a result of variations in bone structure and is believed to have evolutionary significance in terms of protection and support for the eyes and face.