$ 790.01
Details
Dwarfing ordinary ear models, this five times life-size, nonbreakable polymer reproduction depicts the human organ of hearing and balance.The surrounding temporal bone is sagitally sectioned along length of the auditory canal and eustachian tube to simplify tracing the path of soundwaves entering the ear and demonstrate equalized pressure on both sides of the eardrumThe overlying petrous portion of the temporal bone has also been cut away, exposing the entire middle ear chamber and the labyrinthTwo of the middle ear ossicles, the malleus (hammer) and incus (anvil), and the attached see-through tympanic membrane, lift out for hands-on study The entire labyrinth unit, consisting of the cochlea, vestibule, semicircular canals, auditory nerve, and the third ossicle (the stapes [stirrup]), is also detachableTwo of three semicircular canals are made of transparent plastic tubing filled with colored fluid representing the endolymph and contain a visible air bubble that shifts position when tilted, demonstrating the function of the canals in maintaining equilibriumSpiral cutaway of the cochlea shows its three canals in contrasting colors to enhance teaching the concept of pitch 36 Hand-numbered features are identified in the accompanying key Dimensions: 16 × 11 × 7 in. (40 × 27.5 × 17.5cm)
