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“hearing system”
(the ear is the organ of ‘hearing’ + (in ‘mammals’) ‘balance’)
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(in ‘mammals’, the ‘ear’ is usually described as having 3 parts) –>
‘outer ear’
‘middle ear’
‘inner ear’
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(the ‘outer ear’ consists of the ‘pinna’ + the ‘ear canal’)
(since the ‘outer ear’ is the only ‘visible portion’ of the ‘ear’ in most ‘animals’, the word “ear” often refers to the external part alone)
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(the ‘middle ear’ includes the ‘tympanic cavity’ + the 3 ‘ossicles’)
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(the ‘inner ear’ sits in the ‘bony labyrinth’, and contains structures which are key to several ‘senses’…)
*the ‘semicircular canals’*
(which enable ‘balance’ and ‘eye tracking’ when ‘moving’)
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the ‘utricle’ and ‘saccule’
(which enable ‘balance’ when ‘stationary’)
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the ‘cochlea’
(which enables ‘hearing’)
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(the ‘ears’ of ‘vertebrates’ are placed somewhat symmetrically on either side of the ‘head’, an arrangement that aids ‘sound localization’)
(the ‘ear’ develops from the ‘1st pharyngeal pouch’ + ‘6 small swellings’ that develop in the ‘early embryo’ called ‘otic placodes’, which are derived from ‘ectoderm’)
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(the ‘ear’ may be affected by ‘disease’, including ‘infection’ + ‘traumatic damage’)
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(‘diseases’ of the ‘ear’ may lead to ‘hearing loss’, ‘tinnitus’, and ‘balance disorders’ such as ‘vertigo’, although many of these conditions may also be affected by ‘damage’ to the ‘brain’ or ‘neural pathways’ leading from the ‘ear’)
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(the ‘ear’ has been adorned by ‘earrings’ + other ‘jewelry’ in numerous cultures for thousands of years, and has been subjected to [‘surgical’/’cosmetic’ alterations])
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥