Perch dissection lab

Vu-Pap-Bio-1st

Perch

A perch is a type of fish which belongs to the genus PERCA. It is a freshwater fish, and a carnivore that lives in small ponds made up of saltwater or freshwater.

Objectives

The objectives of this dissection lab are to learn about the internal structure of perches, be able to handle dissection tools properly, and to observe the placement of organs and their relationships to one another.

Perch info

Perch dissection

Dissection in progress.....

  1. Put on your gloves to insure your safety
  2. Put perch on a dissecting tray
  3. To expose the internal organs cut part of its muscular wall. Grasp your fish, turn it to the side and using your scissors insert the point into the skin just in front of the anus. Cut forward to the gills, but be careful not to destroy the internal organs.
  4. With your thumb lift the cut area, separating the top and bottom. Using your scissors, cut upward near the anus and the operculum, finish cutting along the lateral line and remove the flap of tissue.
  5. Now that the internal organs are exposed you should try to identify the different organs.

Tools used for dissection

For this dissection you will need latex gloves, dissection scissors, tweezers, teaser needle, and a dissecting tray.

perch anatomy

Vertebrae: any of the bones that make up the spinal column

Liver: Vital organ present in vertebrates

Stomach: Place where food is digested

Air bladder: Sack that fills with air that allows the fish to float

Gonad: Sex gland in which gametes are produced

Heart: Hollow organ that allows for blood circulation

Intestine: the lower part of the alimentary canal

Spleen: A highly vascular, glandular, ductless organ

Urogenital opening: where wastes are expelled into the environment

Pyloric caeca: where food is processed in the stomach

Pharynx with gills: filter feeding organs found in non-vertebrae chordates