the auditory canal is formed out of the spiracle bone of the skull.
the auditory canal is formed out of which bone of the skull?
the spiracle
Na
Na
the external ear (pinna) is a surgically challenging anatomy composed of a delicate and complex framework of shaped cartilage that is covered, on its visible surface, with thin, tightly adherent, hairless skin. although of small area, the surface anatomy of the external ear is complex, consisting of the pinna (the auricle) and the external auditory meatus (auditory canal). the outer framework of the pinna is composed of the rim of the helix, which arises from the front and from below (anteriorly and inferiorly), from a crus (shank) that extends horizontally above the auditory canal. the helix merges downwards (inferiorly) into the cauda helices (tail of the helix), and connects to the lobule (earlobe). the region located between the crura (shanks) of the antihelix is the triangular fossa (depression), while the scapha (elongated depression) lies between the helix and antihelix. the antihelix borders in the middle (medially) to the rim of the concha (shell) and the concha proper, which is composed of the conchal cymba above (superiorly) and the conchal cavum below (inferiorly), which are separated by the helical crus, and meet the antihelix at the antihelical rim. the tragus (auditory canal lobule) and the antitragus (counterpart lobule) are separated by the intertragal notch; the auditory canal lobule does not contain cartilage, and displays varied morphologic shapes and attachments to the adjacent cheek and scalp.
otoplasty