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_______ is a sense organ which is present in all vertebrates.
Inner ear
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What is a neuromast system?
It is a membranous labyrinth located in otic capsule (skeletal labyrinth) surrounded by fluid filled perilympatic space.
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Labyrinths are filled with __________.
Endolymph
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Perilymphatic space is filled with _________.
Perilymph
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What are the functions of the Inner ear?
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Lower verebrates have three _________, two ________, and the ________.
- Semicircular ducts
- Membranous sacs
- Lagena
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_________ becomes the cochlear duct in some reptiles, birds, and mammals.
Lagena
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Sensory neuromast sites are located in __________ of the __________, ____________, and ____________.
- Squamous epithelium
- Sacculus
- Utriculus
- Lagena/ cochlea
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What are maculae?
They are patches of hair found around neuromast sites.
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What is a Crista?
And enlarged neutomast.
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Where do crista occur?
These occur in swelling (ampulla) located at one end of each emicircular duct.
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What is the term for basilar papilla?
Sacculus
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What is the term for the tectorial membrane?
Lagena
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Portions of the ________ and ________ become receptors for sound.
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The lagena elongates to form the __________.
Cochlear duct
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The basilar pappila forms the _______.
Organ of corti
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The sacculus and the lagena associated with perilymphatic spaces coil to form the _________ in mammals.
Cochlea
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The Cochlea is a spiral that has ____ to _____ turns.
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