Class Amphibia Frogs Toads Salamanders Newts Jaclyn Koos

Class Amphibia Frogs, Toads, Salamanders, Newts Jaclyn Koos

Key Characteristics Most have 4 limbs Partially divided heart Skin Soft, thin, & glandular Double-loop circulation Cutaneous respiration

Anatomy Mouth Esophagus Stomach Gall bladder Pancreas Liver Small intestine Large intestine Cloaca Anus Lungs Kidney Ureters Urinary bladder

Digestion One-way digestion Mouth Tongue grabs insects Stomach Intestines Anus

Respiration Lungs Take in oxygen through skin O 2 goes directly to blood stream Gills for underwater breathing Exhale CO 2 waste back into the air

Internal Transport Heart pumps blood to whole body 3 chambered heart Double-loop circulation Ectothermic Cutaneous (skin) respiration

Excretion Kidneys Ureters Large intestine Cloaca Liquid & solid wastes leave through cloaca

Response Brain Spinal cord Nerves Two simple nostril holes Eyes enable to spot moving insects

Movement Legs Webbed feet Tail helps move Jumping legs Suction cups for climbing

Reproduction Females lay eggs Eggs are laid in water Some hatch inside the mother Internal or external fertilization Larval stage may last from 10 days to 20+ years

Examples Caecilians Toads Frogs Salamanders Newts

Facts Existed for around 350 million years Frogs can leap 7. 5 feet in a jump 5, 453 species of frogs & toads 560 species of salamanders & newts 171 species of caeceilians

Chinese Giant Salamander

Literature Cited Prentice Hall Biology book http: //www. shsu. edu/~bio_mlt/AMP HIBIA. html http: //www. angelfire. com/mo 2/anim als 1/amphibian/amphibia. html http: //animals. about. com/od/amphi bians/p/amphibians. htm World Book “A”