Swimming Inside A Perch

Perch Dissection Lab

John Labador

04-09-14

Mitcham-PAPBio-2nd

Objective

-Observe the placement of organs and their relationship to one another

Background Information

Perch is a common name for fish of the genus Perca, freshwater gamefish belonging to the family Percidae. The perch, of which there are three species in different geographical areas, lend their name to a large order of vertebrates: the Perciformes, from the Greek perke meaning spotted, and the Latin forma meaning shape. Many species of freshwater gamefish more or less resemble perch, but belong to different genera. In fact, the exclusively saltwater dwelling red drum is often referred to as a red perch, though by definition perch are freshwater fish. Though many fish are referred to as perch as a common name, to be considered a true perch, the fish must be of the family Percidae

Circulatory System

The circulatory system of the perch is a typical low pressure single type system in which the heart is a single pump and there is a single circuit of blood flow. Venous (deoxygenated) blood from the body is pumped through the heart forward to the gills. From the gills, where it is oxygenated, the blood goes directly to the body. Thus the blood makes a single circuit during which it is pumped, oxygenated, and distributed to the body, before it returns to the heart. In this pattern of circulation the heart pumps only deoxygenated

Other Information

-Fresh water species

-Belongs to the family parcidae