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 The hard covering on each side of the fish that protects the gills and allows water to pass Operculum 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 Location where the solid wastes/reproductive cells are excreted from the body of the fish Opening (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 Key Features/Location Position 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 Function/Use Swim Bladder/ A structure filled with gasses inside of the fish, allowing it to become buoyant and not list Air Bladder Gill Arches The curved structures that house the gill filaments The structures that filter the dissolved oxygen out of the water, so the organism can use it Gill Filaments to survive (passes O2 into bloodstream – heart and gills in similar location) 2 chambers in the fish – muscular structure that pushed blood containing O2 to the rest of Heart the organism’s body It aids in digestion by secreting enzymes that break down the fats; It also helps to work as a Liver 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 Functions in the digestion of food, specifically in breaking down the food that the fish takes Stomach into the body Spleen Functions in red blood cell creation and destruction Functions in digestion of food , specifically, the ability to absorb nutrients into the body of Intestine the fish .