Dictionary » E » Ear

Ear

Ear

1. The organ of hearing; the external ear.

in man and the higher vertebrates, the organ of hearing is very complicated, and is divisible into three parts: the external ear, which includes the pinna or auricle and meatus or external opening; the middle ear, drum, or tympanum; and the internal ear, or labyrinth. The middle ear is a cavity connected by the eustachian tube with the pharynx, separated from the opening of the external ear by the tympanic membrane, and containing a chain of three small bones, or ossicles, named malleus, incus, and stapes, which connect this membrane with the internal ear. The essential part of the internal ear where the fibres of the auditory nerve terminate, is the membranous labyrinth, a complicated system of sacs and tubes filled with a fluid (the endolymph), and lodged in a cavity, called the bony labyrinth, in the periotic bone. The membranous labyrinth does not completely fill the bony labyrinth, but is partially suspended in it in a fluid (the perilymph). The bony labyrinth consists of a central cavity, the vestibule, into which three semicircular canals and the canal of the cochlea (spirally coiled in mammals) open. The vestibular portion of the membranous labyrinth consists of two sacs, the utriculus and sac 1000 culus, connected by a narrow tube, into the former of which three membranous semicircular canals open, while the latter is connected with a membranous tube in the cochlea containing the organ of corti. By the help of the external ear the sonorous vibrations of the air are concentrated upon the tympanic membrane and set it vibrating, the chain of bones in the middle ear transmits these vibrations to the internal ear, where they cause certain delicate structures in the organ of corti, and other parts of the membranous labyrinth, to stimulate the fibres of the auditory nerve to transmit sonorous impulses to the brain.

2. The sense of hearing; the perception of sounds; the power of discriminating between different tones; as, a nice ear for music; in the singular only. Songs . . . Not all ungrateful to thine ear. (Tennyson)

3. That which resembles in shape or position the ear of an animal; any prominence or projection on an object, usually one for support or attachment; a lug; a handle; as, the ears of a tub, a skillet, or dish. The ears of a boat are outside kneepieces near the bow.

4. Same as Acroterium . Same as Crossette.

5. Privilege of being kindly heard; favor; attention. Dionysius . . . Would give no ear to his suit. (Bacon) Friends, romans, countrymen, lend me your ears. (Shak) About the ears, in close proximity to; near at hand. By the ears, in close contest; as, to set by the ears; to fall together by the ears; to be by the ears. Button ear (in dogs), an ear which falls forward and completely hides the inside. Ear finger, the little finger. Ear of Dionysius, a kind of ear trumpet with a flexible tube; named from the Sicilian tyrant, who constructed a device to overhear the prisoners in his dungeons.

(Science: anatomy) ear sand, a simple auditory organ, occurring in many worms, mollusks, etc. It consists of a small sac containing a fluid and one or more solid concretions or otocysts. Rose ear (in dogs), an ear which folds backward and shows part of the inside. To give ear to, to listen to; to heed, as advice or one advising. Give ear unto my song. . To have one's ear, to be listened to with favor. Up to the ears, deeply submerged; almost overwhelmed; as, to be in trouble up to one's ears.

Origin: as. Eare; akin to OFries. Are, ar, os. Ra, D. Oor, OHG. Ra, g. Ohr, Icel. Eyra, Sw. Ora, dan. Ore, goth. Auso, L. Auris, lith. Ausis, Russ. Ukho, gr.; cf. L. Audire to hear, gr, Skr. Av to favor, protect. Cf. Auricle, Orillon. The sense Organ for hearing and equilibrium.The externally visible cartilaginous structure of the external ear.Fruiting spike of a cereal plant especially corn.A sense Organ found in vertebrates that can control balance and the detection of sounds in the external environment.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Changes on our face when we grow

What changes does parts of our face make when we grow up ? Lets see on nose, eye or ear ? Can we find out the age of person by measuring or seeing any parts of any person ??

See entire post
by sshasi009
Thu Mar 13, 2014 5:20 am
 
Forum: Human Biology
Topic: Changes on our face when we grow
Replies: 1
Views: 1154

holographic origin of life

... energy. But what are the implications of all these and how can we test if this is a real scenario? a) This means that during unhostile eons for earth (with growing biodiversity) the sun will boost complexity in terms of number of chemical reactions on earth. The latter must be constantly increasing ...

See entire post
by minasole
Tue Oct 08, 2013 9:30 am
 
Forum: Evolution
Topic: holographic origin of life
Replies: 13
Views: 16500

Re: Sound and how the brain reacts to it

I actually have the same response with my ears when it comes to rustling noises,my ears start to have a tingling sensation & I feel pleasant ,but I thought this article might give some hindsight to what causes this. Good Luck "The ear’s ...

See entire post
by GremlinGnome422
Mon Jul 01, 2013 7:25 pm
 
Forum: Human Biology
Topic: Sound and how the brain reacts to it
Replies: 88
Views: 139936

Unidentified Non-Human Remain

Looks a bit arthritiky to me. Especially if you think it's a knuckle bone! Your ear bone guess seems better- from a whale. Testing specific gravity might help.

See entire post
by animartco
Mon Jun 03, 2013 2:59 pm
 
Forum: Zoology Discussion
Topic: Unidentified Non-Human Remain
Replies: 1
Views: 2059

Re: Is DNA living or non-living thing?? get the answer here

Origin And Nature Of Earth Life, An Update… Liberate your mind from concepts dictated by religious trade-union AAAS. 1) Life is just another mass format. 2) re-comprehend natural selection. 3) natural selection is ubiquitous, for all mass formats. Life Evolves by Naturally Selected Organic Matter ht...

See entire post
by Dov Henis
Fri Dec 28, 2012 4:29 pm
 
Forum: Molecular Biology
Topic: Is DNA living or non-living thing?? get the answer here
Replies: 24
Views: 52938
View all matching forum results

This page was last modified 21:16, 3 October 2005. This page has been accessed 10,105 times. 
What links here | Related changes | Permanent link