Perch dissection Pre-Ap Biology Vu Period 4
What is a perch?
The perch (Perca) is a fish that is commonly found in freshwater areas. These wonderful creatures eat smaller fish, shellfish and insect larvae. They are hunted by even larger fish, fishing birds, large turtles and humans. They have adapted to life in the water by adding gills, fins, scales and lots of mucous.
In this lab, each student will work with a lav group in order to learn frome the dissection of a perch. Dissection gives the student the opportunity to ovserve the placement of organs and their relationships to one another. Before beginning the lab, each student must perform pre-lab research in order to familiarize themselves with the perch. Pictures and diagrams will aid in the completion of this lav dissection. Be thorough and do not rush through this lab. Read all directions carefully and make all drawings as accurate and neat as possible.
The circulatory system
The circulatory system allows the cells of the body to be reoxinanated. It consists of the heart and blood vessels. The heart consists of two major parts: the atrium where blood enters to get oxygen and the ventricle which pumps oxiginated blood back through the body. The blood vessels are composed of 3 different types of veins: arteries which carry oxigenated blood throughout the body, veins which carry blood back to the heart to get reoxigenated, and capilaries which have semi-permeable walls which allow the oxygen to go to the cells and for waste to go back to the heart. The circulitory system is made up of epithelial (blood vessels and outer surface of the heart), muscle (the heart), nervous (tells the blood where to go), and connective tissue.
Perch Circulitory System
The perch has a closed circulitory system
In a perch heart there is one ventricle and one atrium
The Circulatory Song!
There are over 6000 species of perch
The spines over their gill and front dorsal fin act as defensive mechanisms
They grow up to 10-20 inches long
They are classified as semi-anadromous
Credits go to...
Wikipedia (what a suprise!)