Download Structure Function/Use Operculum Dorsal Fin Nostrils Anus

REVIEW GUIDES FOR THE PERCH PRACTICUM
USE YOUR DIAGRAMS, THE ONES ONLINE, AND THE ANSWERS BELOW TO HELP YOU AS YOU COMPLETE A FINAL REVIEW
OF THE PERCH! (IF THE STRUCTURE IS NOT LISTED BELOW, IT IS NOT ON THE PRACTICUM!)
PERCH - EXTERNAL
Complete the chart below with the functions/uses of the structures listed for the Perch.
Structure
Function/Use
Operculum
The hard covering on each side of the fish that protects the gills and allows water to pass
out of the organism after the gills process the dissolved oxygen from the water
Dorsal Fin
The fin on the dorsal side of the fish that allows it to maintain balance in the water
Nostrils
Allows the fish to use its sense of smell on the water
Anus/Urogenital
Opening
Location where the solid wastes/reproductive cells are excreted from the body of the fish
(The perch will fertilize outside of the body)
Pectoral Fin
The fin just behind the operculum that allows the fish to control speed in the water
Lateral Line
A landmark line that we use during the dissection (cut along this line)
The following positional terms are important when understanding the anatomy of the Perch. Describe how you can find
the following areas:
Anatomical
Position
Key Features/Location
Caudal End
The posterior end (back end where the caudal fin is located)
Dorsal Side
The top of the fish (from the view of the fish resting on its pelvic fins)
PERCH - INTERNAL
Complete the chart below with the functions/uses of the structures listed for the Perch.
Structure
Swim Bladder/
Air Bladder
Function/Use
Gill Arches
The curved structures that house the gill filaments
Gill Filaments
The structures that filter the dissolved oxygen out of the water, so the organism can use it
to survive (passes O2 into bloodstream – heart and gills in similar location)
Heart
2 chambers in the fish – muscular structure that pushed blood containing O2 to the rest of
the organism’s body
Liver
It aids in digestion by secreting enzymes that break down the fats; It also helps to work as a
storage area for many carbohydrates and fats; The liver also works to help in playing a role
in destroying old blood cells to help it maintain the proper chemistry within the blood
Stomach
Functions in the digestion of food, specifically in breaking down the food that the fish takes
into the body
Spleen
Functions in red blood cell creation and destruction
Intestine
Functions in digestion of food , specifically, the ability to absorb nutrients into the body of
the fish
A structure filled with gasses inside of the fish, allowing it to become buoyant and not list