Fish has specialised structures called the gills to carry out exchange of ... by a movable cover called the operculum (refer to the first diagram in this section). www.tutorvista.com |
What gills do for fishes? they allow them to breath underwater. Why fish have gills ? fish have gills to breath underwater. They cant breath on land because gills ... wiki.answers.com |
The diagram shows the way in which water flows over the gills of a fish. alt=" Copyright S-cool" />. The graph below shows the changes in pressure in the buccal ... www.s-cool.co.uk |