By: Amy Zerbe, Marissa Hawthorne and Ankit Patel

FishFish are the world’s oldest vertebrates.The first fish appeared around 500 million

years ago.There are over 24,000 species today.

Fish Continued…They breathe using gills, which draw oxygen

from the water and into the bloodstream. These gills are located on the side of the

fish’s head.Most have bones, but some are made of

cartilage.

Fish Continued…Class Agnatha (Jawless Fish) - no jaws, no

paired fins, skeleton made of cartilage not bone.

EX. Hagfish

Fish Continued…Class Chondrichthyes (cartilaginous fish) -

skeleton made of cartilage, paired fins.EX. Shark

Fish EndClass Osteichyes (bony fish) – skeleton made

of bone, paired fins, most fish are bony fish.EX. Nemohttp://www.enchantedlearning.com/subjects/f

ish/printouts/Fishcoloring.shtml

AmphibiansThe earliest Frog is about 190 million years old.They have 3 chambered hearts.Sometimes they don’t have lungs, or they have

reduced lungs, but they breath through their skin. Breathing through the skin is called Cutaneous Gas Exchange.

Frogs have smooth skin and live in water most of their life, but toads have rough skin and live on land most of their life. Female toads don’t make much noise, but males make a lot of noise.

Amphibians Continued…In extreme climates, frogs enter dormancy

which is called estivation.When they are in estivation, they require very

little oxygen.Unlike the tails of lizards, salamanders don’t

have fracture zones. They also can regenerate their limbs.

Ex. They can escape by making their tail fall off.

Amphibians Continued…Amphibians are really good bio-indicators.

This means that they can tell something about the environment they live in.

Ex. They camouflage themselves in different environments.

They can adapt to the conditions in water and land.

Blood typeAmphibians are cold-blooded and get their

heat from outside sources.Their temperature depends on the

environment they live in.Amphibians become more active in warmer

weather than cold weather. They are very lazy during colder weather.

HabitatThey start their life underwater, then move

towards land during adulthood. Amphibians adapt to many different habitats,

including man made environments.They prefer wet and moist environments,

which include wetlands, shallow ponds, and marsh pools.

NutritionAmphibians are carnivores. They eat many types of fish, small reptiles,

and even other amphibians.On land, they eat worms and insects (such as

spiders and flies).Frogs eat by protruding out their tongue, and

caecilians kill their prey with their sharp teeth.

BreedingAmphibians mostly breed in fresh water.

However, some do breed in moist places, in the ground, and even on leaves.

Their eggs are clear, with a jelly-like texture.Eggs – laid in masses in the water.Most of them go through metamorphosis, but

in some cases the eggs hatch into mini frogs and live in damp places.

Works Citedhttp://www.buzzle.com/articles/facts-and-char

acteristics-of-amphibians.htmlhttp://www.nefsc.noaa.gov/faq/fishfaq1.html#

q2http://forum.belmont.edu/cornwall/shark.jpghttp://www.the-reel-mccoy.com/movies/2003/i

mages/FindingNemo1.jpghttp://boomerbabesrock.com/blog/wp-content

/uploads/2007/07/dory.jpghttp://www.amersol.edu.pe/class11/_11kdeaz

a/MYPBio/images/Clown_Fish_.jpeg

Works Citedhttp://www.freewebs.com/giornale/Kermit

%20the%20Frog.JPGhttp://www.istockphoto.com/

file_thumbview_approve/5202248/2/istockphoto_5202248-frog-catching-a-fly.jpg

http://www.svgs.k12.va.us/Outreach/Activities/sickfrog/Images/bellfrog_illus.jpg

http://fwp.mt.gov/content/getItem.aspx?id=19358&maxwidth=475