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4. What do the gills look like? How is their structure related to their
function?
The gills can be seen by the photo below. Each slit is like a rectangular shape, in which the gills help the shark to breathe underwater.
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Dogfish Gills |
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5. What is the function of the lateral line.
The lateral line system, found in many fishes and in some aquatic amphibians, is sensitive to differences in water pressure. These differences may be due to changes in depth or to the currentlike waves caused by approaching objects. The basic sensory unit of the lateral line system is the neuromast, which is a bundle of sensory and supporting cells whose projecting hairs are encased in a gelatinous cap. The nueromasts continuously send out trains of nerve impulses. In other words, the lateral line system is used as a sensing cell. |
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