5 Body Parts You Didn't Know You Had From the auriculares to the philtrum By Arden Dier, Newser Staff Posted Apr 5, 2014 4:05 PM CDT 15 comments Comments Say aah! (Shutterstock) (Newser) – Considering that we live in our bodies day in and day out, it's perhaps surprising that we don't know all that much about them. LiveScience seeks to inform, offering up 10 "little-known" body parts. A sampling: The auriculares: We all have this group of muscles, but only a select few can use them to wiggle their ears. Philtrum: Also known as a medial cleft, it's that cute-looking groove in the middle of your upper lip that serves no apparent function in humans. Anterolateral ligament: If you haven't heard of this ligament in the knee, attached to your femur, it's probably because researchers just recently proved it exists. Another recent discovery? An extra layer of your eye's cornea known as Dua's layer. But hey, it's easy to miss at just one-millionth of a meter thick. Hyoid bone: This horseshoe-shaped bone, between the chin and thyroid cartilage, is the only one not connected to another bone; it helps with speech. Click through for the full list.