{"id":1800,"date":"2020-07-13T08:58:14","date_gmt":"2020-07-13T08:58:14","guid":{"rendered":"https:\/\/murreeroad.org\/Biology10\/?p=1800"},"modified":"2020-07-13T08:58:14","modified_gmt":"2020-07-13T08:58:14","slug":"q-11-explain-the-structure-of-human-ear-in-detail-describe-its-functioning-in-balancing-of-body","status":"publish","type":"post","link":"https:\/\/murreeroad.org\/Biology10\/q-11-explain-the-structure-of-human-ear-in-detail-describe-its-functioning-in-balancing-of-body\/","title":{"rendered":"Q.11 Explain the structure of human ear in detail. Describe its functioning in balancing of body."},"content":{"rendered":"

Q.11\u00a0Explain the structure of human ear in detail. Describe its functioning in balancing of body.<\/strong>
\nAnswer:<\/strong>
\nEar<\/strong>
\nHearing is as important as vision. Our ear helps us in hearing and also to maintain the balance or equilibrium of our body.
\nStructure of Ear <\/strong>
\nEar has three main parts i.e.
\n(a) External ear (b) Middle Ear (c) Internal Ear.
\n(a) External Ear <\/strong>
\nParts of external ear <\/strong>
\nExternal ear consists of pinna, auditory canal and eardrum (tympanum).
\nPINNA <\/strong>
\nPinna is the broad external part, made of cartilage and covered with skin.
\nAUDITORY CANAL <\/strong>
\nPinna helps to direct sound waves into auditory canal. There are special glands in the walls of auditory canal which produce wax.
\nFunction of hair and wax <\/strong>
\nThe hair and the wax in auditory canal protect ear from small insects, germs and dust. They help to maintain the temperature and dampness of auditory ca\u0146al.
\nEAR DRUM <\/strong>
\nAuditory canal ends in ear drum. This thin membrane separates external ear from the middle ear.
\n\"human
\n(b) Middle ear <\/strong>
\nMiddle ear is a chamber after external ear.
\nBones <\/strong>
\nThree small bones, called middle ear ossicles, are present in a chain in middle ear. These moveble bones include malleus, incus and stapes. These three bones are collectively called middle ear ossicles. Malleus <\/strong>
\nIt is attached with eardrum, then comes incus and finally stapes.
\nStapes <\/strong>
\nIt is the smallest bone of body.
\nOval window <\/strong>
\nStapes is connected with a membrane called oval window. Oval window separates middle ear from inner ear. Middle ear also communicates with the nasal cavity through
\neustachian tube.
\nFunction of Eustachian tube.<\/strong>
\nThis tube regulates the air pressure on both sides of ear drum. (c) Inner ear Parts of inner Ear
\nInner ear consists of three parts i.e. vestibule, semicircular canals and cochlea. Vestibule
\nIt is present in the centre of inner ear.
\nSemicircular canals : <\/strong>
\nThree canals called semicircular canals are posterior to the vestibule.
\nCochlea <\/strong>
\nThe cochlea is made of three ducts and wraps itself into a coiled tube.
\nSound Receptor cells <\/strong>
\nSound receptor cells are present within the middle duct of cochlea.
\n\"inner
\nThe process of hearing<\/strong>
\nThe pinna of the external ear focuses and directs sound waves into auditory canal. The sound waves strike ear drum and produce vibrations in it. From ear drum, the vibrations strike middle ear and produce further vibrations in malleus, incus and then stapes. From stapes, the vibrations strike the oval window and then reach the fluid-filled middle duct of cochlea. The fluid of cochlea is moved and receptor cells are stimulated. The receptor cells generate a nerve impulse, which travels to brain and is interpreted as sound.
\nEars maintain the balance of body<\/strong>
\nSemicircular canal and vestibule help to maintain the balance of body. Semicircular canals contain sensory nerves which can detect any movement of head. Vestibule can detect any change in the posture of body. The neurons coming from these two receptors reach cerebellum through the auditory nerve.<\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Q.11\u00a0Explain the structure of human ear in detail. Describe its functioning in balancing of body. Answer: Ear Hearing is as important as vision. Our ear helps us in hearing and also to maintain the balance or equilibrium of our body. Structure of Ear Ear has three main parts i.e. (a) External ear (b) Middle Ear… Read More »Q.11 Explain the structure of human ear in detail. Describe its functioning in balancing of body.<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[23],"tags":[],"_links":{"self":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1800"}],"collection":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/comments?post=1800"}],"version-history":[{"count":1,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1800\/revisions"}],"predecessor-version":[{"id":1803,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/posts\/1800\/revisions\/1803"}],"wp:attachment":[{"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/media?parent=1800"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/categories?post=1800"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/murreeroad.org\/Biology10\/wp-json\/wp\/v2\/tags?post=1800"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}