Structure of the eye and ear :: essays research papers

Structures of the substance and earWe use our ears for the hearing sense, and we use our look for vision.Both be very important senses and would be hard to get along without. We trust on hearing for communication, navigation, entertainment and manyother purposesNow for our tendernesss we use them for vision, their like our own personal cameras, both corroborate and use lens to focus on images.The eyes respond to the panoptic spectrum, this spectrum is made up of wavelengths of different sizes. The shorter waves produce a purple color, duration Longer wavelengths produce blue, yellow, green and orange, and the longestWaves are red. Saturation, brightness, and hue in all are components used in the Visible spectrum.More than half of the sensorial receptors in the body happen to belocated in the eyes, to a fault the cerebral cortex plays a large role in process Visual information.Some accessory structures of the eye are the eyelids, eyelashes, eyebrows, Lacrimal apparatus, and the inessential eye muscles. The eyelids or (palpebrae) Are used for shade, whether its for sleeping or from excessive light, or from inappropriate objects that dont belong in the eye. While the eyelids are protecting The eye it also helps at the uniform time by spreading lubricates over the eyeballs.The eyelashes help protect from foreign objects and perspiration, as well do the Eyebrows . The Lacrimal apparatus is a radical of small structures, when humans Express emotions with tears, the Lacrimal apparatus helps to produce and pastDrain those tears away. There are six extrinsic eye muscles to help move each Eye the superior rectus, inferior rectus, asquint rectus, medial rectus, superior oblique and inferior oblique. Circuits in the brain waist and cerebellum tell these muscles what to do. The structure of the eye begins with the fibrous tunic, vascular tunicAnd the retina. These are all on the wall of the eyeball, the fibrous tunic consist of the cornea and the sclera. Th e cornea is what covers the iris, and is the outermost layer of the eye through which light passes. The sclera or the face cloth of the eye, this is what gives form to the eyeball. The vascular tunic has three parts to it the choroids, ciliary body, and the iris. The choroids is what provides nutrients to the prove of the retina. The ciliary body consist of ciliary muscle and the iris which is the grim part of the eye, it regulates the amount of light