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Helix- Above the tragus a prominent ridge, the helix arises from the floor of the concha and continues as the incurved rim of the upper portion of the auricle.<\/p>\n"},"library":"H5P.Text 1.1","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"002c5dc5-4403-4a2c-944a-bd82992cd053"}],"header":"Helix"},{"position":{"x":52,"y":29.264937106918236},"alwaysFullscreen":false,"content":[{"params":{"text":"

The middle ear is a narrow air-filled cavity in the temporal<\/a> bone. It is spanned by a chain of three tiny bones<\/a>\u2014the malleus (hammer), incus (anvil), and stapes (stirrup), collectively called the auditory ossicles. <\/p>\n"},"library":"H5P.Text 1.1","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"68f4cf1e-9b89-45b2-be86-83d4ad908857"}],"header":"Temporal bone"},{"position":{"x":65.60000000000001,"y":40.320361635220124},"alwaysFullscreen":false,"content":[{"params":{"text":"

The thin semitransparent tympanic membrane<\/a>, or eardrum, which forms the boundary between the outer ear and the middle ear, is stretched obliquely across the end of the external canal. Its diameter is about 8\u201310 mm (about 0.3\u20130.4 inch), its shape that of a flattened cone with its apex directed inward. Thus, its outer surface is slightly concave. The edge of the membrane is thickened and attached to a groove in an incomplete ring of bone, the tympanic annulus, which almost encircles it and holds it in place. The uppermost small area of the membrane where the ring is open, the pars flaccida, is slack, but the far greater portion, the pars tensa, is tightly stretched. The appearance and mobility of the tympanic membrane are important for the diagnosis<\/a> of middle-ear disease, which is especially common in young children. When viewed with the otoscope, the healthy membrane is translucent and pearl-gray in colour, sometimes with a pinkish or yellowish tinge.<\/p>\n"},"library":"H5P.Text 1.1","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"a9affef9-6948-4bb9-a81f-87b504758215"}],"header":"Tympanic Membrane"},{"position":{"x":81.2,"y":37.165880503144656},"alwaysFullscreen":false,"content":[{"params":{"text":"

There are actually two labyrinths<\/a> of the inner ear<\/a>, one inside the other, the membranous labyrinth<\/a> contained within the bony labyrinth<\/a>. The bony labyrinth consists of a central chamber called the vestibule, the three semicircular canals, and the spirally coiled cochlea. Within each structure, and filling only a fraction of the available space, is a corresponding portion of the membranous labyrinth: the vestibule contains the utricle and saccule, each semicircular canal its semicircular duct, and the cochlea its cochlear duct.<\/p>\n"},"library":"H5P.Text 1.1","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"3115f9de-796f-421a-871d-df90f2c4bf34"}],"header":"Cochlea"},{"position":{"x":85.2,"y":61.56643081761006},"alwaysFullscreen":false,"content":[{"params":{"text":"

In the front (anterior) wall is the opening of the eustachian tube<\/a> (or auditory tube), which connects the middle ear with the nasopharynx. <\/p>\n"},"library":"H5P.Text 1.1","metadata":{"contentType":"Text","license":"U","title":"Untitled Text"},"subContentId":"b9d80fbc-3fff-4596-9ac9-b7f8d4ac213a"}],"header":"Eustachian tube"}],"hotspotNumberLabel":"Hotspot #num","closeButtonLabel":"Close","image":{"path":"images\/image-63750fe156f27.jpg","mime":"image\/jpeg","copyright":{"license":"U"},"width":624,"height":385}}