NURS 203 Chapter 16: Unit 5 - Jarvis Chapter 16 Summary
Document Summary
Jarvis: physical examination & health assessment, 2nd canadian. This section discusses key points about the structure and function of the ears. The ear is the sensory organ for hearing and maintaining equilibrium. It has three parts: the external, middle, and inner ear. The external ear (or auricle or pinna) has six landmarks: the helix, antihelix, external auditory meatus, tragus, antitragus, and lobule. The translucent, pearly grey, tympanic membrane (or eardrum) separates the external and middle ear. Otoscopic inspection of this membrane reveals several features: o o o o o. The malleus pulls at the centre of the ear, causing it to appear oval and slightly concave. Almost in the centre, the umbo is where the first ossicle is attached. The pars flaccida is the small, slack, superior section of the membrane. The pars tensa is the remainder of the membrane. The middle ear is a small air-filled cavity inside the temporal bone.
