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biology

amphibia

Questionhead and tru
other characteristics internal nares to make breathing possible by keeping mouth closed and reduction in bones to make body lighter
body division and limbs head and trunk 2 pairs of pendactyl limbs with 4 5 or fewer digits some without legs like caecillians webbed feet
skin and exoskeleton skin smooth moist and rich in glands highly vascular scales mostly absent some glands poisonous
respiration and metabolism larval stage by gills and adults by skin and lungs
heart and ciculation cold blooded three chambered heart with truncus arteriosus and sinus venosus double circulation
reproduction sexes are separate feritilization either internal or external most are oviparous cloaca presence
eggs characteristics anamnion no protective shell
examples frogs salamender mudpuppy toads
Created by: sundas bano
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