Swimming Circles on the Inside
By: Ania Lewis ~ Ms. Vu - PAP Biology - Period 4th
Perch Circulatory System
Objectives
We will explore the internal and external parts of a perch
We will cover the organs and other parts of the perch
We will learn the functions and locations of these organs
We will study the structure and functions of perch
Background Information
The scientific name for a perch is Perca flavescens
Perch live in rivers
Preyed on by larger fish such as pike, largemouth bass, humans
Eats algae, plankton, and some small fish (secondary consumer)
Taxonomy:
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Percidae
Genus: Perca
Species: Perca flavescens
Evolution:
Scales protect the fish from its environment
Perch have special teeth used for eating smaller fish
Small filters found within the gills have the ability to filter out zooplankton
Perch are able to mask their scent using chemicals and hide in plain sight
Human Impact/ Influence:
Humans catch fish as a food source
Humans pollute waters that could kill the animal
Perch help keep the population of aquatic animals stable
Parts of the perch are used in the making of products such as leather
Before
After
Labels
Cross- section of a perch
Circulatory System
Organs: heart (2 chambers), atrium, ventricle, dorsal aorta, jugular vein
Heart- organ that pumps blood and maintains circulation throughout the body
Atrium- receives oxygen rich blood
Ventricle- pumps blood to the entire body
Dorsal aorta- carries blood from heart to all of the organs.
Jugular vein- carries blood from head to face
When blood enters the heart, it enters through the atrium and exits through the ventricle. The blood is then pumped throughout the whole body with assistance from the dorsal aorta and the jugular vein.
Heart is found just behind and below the gills
Extra Information
The operculum cover and protect the gills
Perch fish don’t have eyelids
Perch have 4 layers of gills
The area around the gullet and the opening of the esophagus is very elastic in order to allow the fish to turn its tail and body to steer through the water
Fish have swim bladders to allow the fish to sink or float
Works Cited
http://www.carolina.com/pdf/activities-articles/anatomy-perch.pdf
http://www.smithlifescience.com/comparativeanatomy.htm
http://www.youtube.com/watch?v=TAFazucGJZs
http://visual.merriam-webster.com/images/animal-kingdom/fishes/bony-fish/anatomy-perch.jpg
http://www.fcps.edu/islandcreekes/ecology/yellow_perch.htm
http://www.scientificamerican.com/article/fish-uses-chemical-cloaking-to-hide-from-prey/