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Standard XII
Biology
Question

The tympanic cavity in frog communicates with pharynx ventrally through

  1. Bidders canal
  2. Horizontal canal
  3. Semicircular canal
  4. Eustachian tube

A
Bidders canal
B
Horizontal canal
C
Semicircular canal
D
Eustachian tube
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Solution
Verified by Toppr

As shown in the diagram, the tympanic cavity communicates with the buccopharyngeal cavity through the eustachian tube. It controls the pressure within the middle ear, making it equal with the air pressure outside the body.
So, the correct option is 'Eustachian Tube'.

1001230_680092_ans_1c6d50d053e143d68704afaf4071385b.jpg

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