Ear & Eye Anatomy PDF
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Uploaded by TrustingProtactinium
Batterjee Medical College
Dr.Abdullah Elagali
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Summary
This document provides an overview of the structure and function of the human eye and ear, including diagrams and explanations of various parts like the cornea, lens, retina, cochlea, and eardrum. It discusses topics such as eye color, layers of the retina, and the functioning of the ciliary body.
Full Transcript
Ear & Eye Dr.Abdullah Elagali Ear Parts of the Ear The ear is divided into: µ___rfTd ’ The external ear ’ The middle ear.(The middle ear cavity is lined with simple IS cubical cells) nucleus...
Ear & Eye Dr.Abdullah Elagali Ear Parts of the Ear The ear is divided into: µ___rfTd ’ The external ear ’ The middle ear.(The middle ear cavity is lined with simple IS cubical cells) nucleus rounded ’ The inner ear (the Cochlea ) THE EXTERNAL EAR 1-The ear pina: formed of elastic cartilage covered by thin (hairy) skin. enanted It Directs sound waves to inside 2-The external auditory meatus : -A flattened canal extend from ear pinna to tympanic membrane. -Lined with thin skin containing hair follicles, Sebacious 0 glands ,and modified sweat glands called ceruminous wax glands which secret a brownish semisolid wax. IIIroduce 3-The tympanic membrane (ear drum) : -covered by simple cubical epithelium nucleus rounded -Transmission of sound vibrations from outer ear to bony ossicles of middle ear. in present Eye The Eye Wall NTÉISTI 1- Outer fibrous layer (supporting) a) cornea anterior (Stratified squamous non keratinized) epithelium:, b) sclera posterior (formed of dense irregular connective tissue) 2-Middle vascular layer (vascular and pigmented) a) iris b) ciliary body c) choroid 3-Inner nervous layer a) Retina Eye Color M ya absorption fttosify ’ The amount of melanin in the iris pigmented epithelium on the back of iris. THE CILIARY BODY The Epithelial Cells : Formed of 2 layers inner, and outer cell layers. 25 cell layer : is formed of non-pigmented a)The inner cells. If cell layer : is formed of pigmented cells. b)The outer Choroid ’ Have a black color. ’ Function: nourish the outer part of retina. LENS.Focus light on the retina. LayersNOV of 6stthe retina ’ 1- Pigmented epithelium ’ 2- Layer of rod and cone cells bipolar contain ’ 3- Outer limiting membrane ’ 4- Outer nuclear layer ’ 5- Outer plexiform layer ’ 6- Inner nuclear layer ’ 7- Inner plexiform layer ’ 8- Ganglion cell layer ’ 9- Nerve fiber layer ’ 10- Inner limiting membran
