Evolution of the cochlea Thus evidence from fossils demonstrate homoplasies for the detachment of the ear from the jaw. Furthermore, it is apparent that the land-based eardrum, or tympanic membrane, and connecting structures such as the Eustachian tube evolved convergently in multiple different settings as opposed to being a defining morphology. Evolution of the cochlea Cochlea is Latin for “snail, shell or screw” and originates from the Greek word κοχλίας "kohlias". The modern definition, the auditory portion of the inner ear, originated in the late 17th century. Within the mammalian cochlea exists the organ of Corti, which contains hair cells that are responsible for
Stirrup word "stirrup" stems from Old English "stirap, stigrap", Middle English "stirop, styrope", i.e. a mounting or climbing-rope. From Old English "stīgan" "to ascend". The stirrup, which gives greater stability to a rider, has been described as one of the most significant inventions in the history of warfare, prior to gunpowder. As a tool allowing expanded use of horses in warfare, the stirrup is often called the third revolutionary step in equipment, after the chariot and the saddle. The basic tactics of mounted warfare were significantly altered by the stirrup. A rider supported by stirrups was less likely to fall off