Unit 2- Ventilation in fish

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  • Created by: Abi
  • Created on: 15-05-12 21:46

Ventilation in Fish


1) The mouth opens.

2) The mouth muscles contract, lowering the floor of the mouth and the opercular muscles contract, pushing the opercular outward.

3) This increases the volume of the buccal cavity and the opercular cavity.

4) This decreases the pressure of water in the buccal cavity below the outside


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