Amphibians By: Bailey Walker

Key Characteristics Unshelled eggs Permeable skin Carnivorous adults Cold blooded 3 chambered hearts

Anatomy

Digestion Take food through mouth (do not chew) 2 parts Alimentary canal provides physical environment to digest Digestive glands produce chemicals to breakdown food

Respiration Breathe through skin Gills Lungs

Internal Transport Nostrils Lungs

Excretion Go to the bathroom like humans Sweat glands Respiration (Gases)

Response Become paler or darker Gets through brain Then the whole body “Motivation” to find prey

Movement Caudata move like snakes Tailless amphibians leap with their back legs Walk Swim

Reproduction External Fertilization Mostly frogs and toads Male hold female in an amplexus pose and releases sperm on eggs Releases a packet of sperm called spermaphore onto ground and female pulls it into her cloaca. Salamanders

Reproduction continuing.. Eggs Eggs hatch to larvae or tadpoles Larvae grow flat tails and feed on vegetation Tadpoles go through metamorphosis and grow lungs

Examples Urodela Anura Apoda

Facts There are between 5,000 and 6,000 species of known Amphibians alive today. First amphibian appeared approximately 370 million years ago. Amphibians were the first 4 limbed vertebrates. Amphibians have delicate skin. Chinese giant Salamander is the largest amphibian.

Works Cited skin.htm skin.htm