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Perch Dissection Lab
Transcript of Perch Dissection Lab
The circulatory system is made up of five main components. These are a two-chambered heart, arteries, gills, veins, and capillaries.The perch circulatory system is a low pressure, single-loop system. There is one direction of blood flow from the heart.
Deoxygenated blood is pumped throughout the heart and goes to the gills. In the gills, the blood becomes oxygenated, getting rid of carbon dioxide. Then the blood goes to the body.
In this lab, each student will work with a lab group in order to learn from the dissection of a perch. Dissection gives the student the opportunity to observe the placement of organs and their relationships to familiarize themselves with the perch.
Lives in freshwater all over the world
Has two dorsal fins, one has long sharp spines, the other has only one sharp spine
Eats worms, small fish, nymphs, larvae, and many of their small perch
Found close to beds of reeds and bullrush, which their striped bodies make it easy to hide in.
Predators: larger fish, birds, and sometimes bullfrogs.
By: Meagan McAuliffe
Vu-PAP Bio-P. 1
Perch is native to North America.
A perch has an oval back and as it grows it develops a humped back.
Perch breeds in the late spring by laying eggs in soft weed beds.
Females are larger and males are darker with an edgy anal fin.
When threatened, a perch will raise its fins for defense, as they can inflict a painful injury to the predator.
There are over 6000 species of perch and over 150 families.
The heart is composed of four parts. These parts are the sinus venosus, the atrium, the ventricle, and the bulbus arteriosus. The heart pumps blood throughout the fish in a single loop.
There are many arteries in a perch. These include the efferent branchil arteries, afferent branchial arteries, the ventral aorta, the intestinal artery, gonadal artery, pneumatic artery, dorsal aorta and the celiac artery. The afferent branches of the ventral aorta move blood to the gills. The aortas (ventral and dorsal) distribute oxygenated blood.
The gills of a perch are very important to the circulatory system. The gills is where the blood becomes oxygenated.
The veins of a perch consist of the hepatic portal vein, the intestinal vein, the left posterior cardinal vein, and the right posterior cardinal vein. The veins in a perch's circulatory system deliver deoxygenated blood to the heart.
Capillaries are very nutrient rich and there are very many of them. The capillaries distribute oxygenated blood from the arteries to the tissues of the body and send deoxygenated blood back from these tissues to the veins.