Ch. 3Ch. 3Sec. 3 AmphibiansSec. 3 Amphibians
Table Total # of toothpicks
# of green toothpicks
1 40 82 31 33 32 44 6 35 32 46 32 6
Camouflage Activity
What is an amphibian?What is an amphibian?
•ectothermic vertebratesectothermic vertebrates
`̀ 2 loop circulatory 2 loop circulatory
systemsystem 3 chambered heart3 chambered heart
–2 upper 2 upper chambers=chambers=atria atria receive bloodreceive blood
–1 lower chamber=1 lower chamber= ventricleventricle- pumps - pumps blood blood body body
amphibian= double lifedouble life
Amphibian reproductionAmphibian reproduction
• metamorphosis• egg tadpole (larva that swim & have gills) adults- lose gills & get lungs
A tadpole’s circulatory system A tadpole’s circulatory system has a single loop & a heart has a single loop & a heart with 2 chambers, like a fish.with 2 chambers, like a fish.
frogs & toadsfrogs & toads salamanderssalamanderseggs eggs
fertilizedfertilized externallyexternally internally internally
how obtain how obtain foodfood
wait for prey to wait for prey to come closecome close
(use camouflage)(use camouflage)
actively stalk actively stalk & ambush & ambush
preyprey
movementmovement 1. powerful hind 1. powerful hind leg muscles leg muscles
2. skeleton that 2. skeleton that can absorb shock can absorb shock
of landingof landing
crawlcrawl
Attributes of amphibians
frogs & toadsfrogs & toads
adapted for hopping & leaping:– strong skeletons– muscular limbs
Frogs have smooth, moist skin.
Toads have drier, bumpier skin than frogs. Many toads have large lumps behind their eyes that ooze a poisonous liquid when attacked.
Three groups of amphibiansThree groups of amphibians
red spotted newt
reasons for decreasingreasons for decreasingamphibian populationsamphibian populations
1.1. habitat habitat (specific environment in (specific environment in which an animal lives)which an animal lives) destruction destruction
2.2. poisons in environment- poisons in environment- insecticides pollute waterinsecticides pollute water• weaken adultweaken adult• kill eggs kill eggs • deform tadpolesdeform tadpoles
Golden frogs are rarely seen anymore in their native habitat —the rain forests of Panama.
What are two possible causes for the decrease in the number of golden frogs?
Discharge contaminated with coal combustion wastes.
Bullfrog tadpoles raised in a control habitat (A) and in an area contaminated with coal combustion wastes (B & C).
Vitamin A compounds in lake water may be at least partly responsible for frog deformities.
Effects of Effects of toxins in toxins in the the environmeenvironmentnt
Deformed frog photos
On the hunt for hellbenders…
Red Red Cheeked Cheeked
SalamanderSalamander
FROG, TOAD or FROG, TOAD or SALAMANDER ?SALAMANDER ?
FROG ,TOAD or SALAMANDER?FROG ,TOAD or SALAMANDER?
have smooth, moist skin
FROGFROG
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
dry, bumpy skin
TOADTOAD
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
keep their tails as adults
SALAMANDESALAMANDERR
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
adapted for hopping & leaping
TOADTOAD
FROGFROG&&
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
legs not adapted for jumping
SALAMANDESALAMANDERR
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
Actively stalk Actively stalk & ambush & ambush
preyprey
SALAMANDESALAMANDERR
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
external fertilization
TOADTOAD
FROGFROG&&
FROG, TOAD or SALAMANDER?FROG, TOAD or SALAMANDER?
drier, bumpier skin
TOADTOAD
Wait for prey Wait for prey to come closeto come close
(use (use camouflage)camouflage)
FROG, TOAD or FROG, TOAD or SALAMANDER?SALAMANDER?
TOADTOAD
FROGFROG&&
What is the first What is the first stage of the frog stage of the frog
life cycle?life cycle?
The first stage of The first stage of the frog life the frog life cycle is the cycle is the eggegg. .
What is the What is the second stage of second stage of
the frog life the frog life cycle?cycle?
The second stage of the frog life cycle is the tadpole.
What is the last What is the last stage of the frog stage of the frog
life cycle?life cycle?
The last stage of the frog life cycle is the adult frog.
1.Groups of amphibians1.Groups of amphibians 2.Reproduction and 2.Reproduction and DevelopmentDevelopment
3. Obtaining Oxygen3. Obtaining Oxygen 4. Circulatory System4. Circulatory System
frogs toads
salamanders
Front of paper
5. Obtaining Food5. Obtaining Food 6. Movement6. Movement
7. Amphibians in danger7. Amphibians in danger NameNameDateDateScienceSciencePictures of Ch. 3 Sec. 3 Pictures of Ch. 3 Sec. 3 SubheadingsSubheadings
Chemicals cause tadpoles to be deformed.
Back of paper