ANATOMICAL STRUCTURES YOU MUST KNOW AND BE ABLE TO IDENTIFY ON THE EYE MODEL: Some external features: The six extrinsic eye muscles Eye lids and lashes Lateral and medial commissure (canthus) Palpebral fissure Palpebral conjunctiva Bulbar conjunctiva Lacrimal glands Their excretory ducts Lacrimal punctum Lacrimal sac Nasolacrimal duct Layers of the eye ball: Sclera (sclerotic coat) Cornea (transparent sclera at anterior of eye ball) Choroid Retina Anterior chamber Region where aqueous humor is found Suspensory ligaments Cillary bodies and processes Iris Pupil Lens Posterior segment (chamber) Region where vitreous humor is found Important areas on the retina: Optic disc (blind spot) Fovea centralis (yellow spot) Optic nerve ANATOMICAL STRUCTURES YOU MUST KNOW AND BE ABLE TO IDENTIFY ON THE EAR MODEL: External ear: Auricle or pinna External acoustic meatus Tympanic membrane (ear drum) Middle ear Ear ossicles Pharyngotympanic tube (auditory tube—also called Eustachian tube) Inner ear Cochlea (Organ of Corti) Oval window Round window Area where Indolymph and perilymph are found Cochlea duct Semicircular canals Anterior Horizontal Posterior Indolymph