Biology
Where are the following located? State their main functions:
(a) Yellow spot
(b) Lacrimal gland
(c) Organ of Corti
(d) Eustachian canal
(e) Incus
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Answer
(a) Yellow spot lies at the back of the eye almost at the centre on the horizontal axis of the eyeball. It is the region of brightest vision and also of colour vision.
(b) Lacrimal glands are located at the upper sideward portion of the eye orbit. They pour the secretion in the form of tears which serves as a lubricant, antiseptic and even washes away dust particles from the eyes.
(c) Organ of Corti is present in the middle cochlear canal of the ear. It helps in hearing.
(d) Eustachian canal connects middle ear to throat. It balances air pressure on either sides of tympanum.
(e) Incus is located in middle ear. It helps in transmission of sound from external to internal ear.
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