Class Amphibia Flashcards
What is the class?
Amphibia
What does Amphibia mean?
both sides of life
What happens during Amphibia larval stage
changes to terrestrial adult form (metamorphosis)
What is the skeleton like?
mostly bony with varying number of vertebrae; ribs present in some
What are the limbs like?
-Tetrapod (4 limbs)
What is the skin like?
-skin smooth & moist w/ many glands (some poison glands)
-pigment cells (chromatophores)
-no scales except for concealed dermal scale
What is the mouth like?
-large mouth w/ small teeth in upper or both jaws
-two nostrils open into anterior part of mouth cavity
What is respiration like? through what in the larval form?
-by lungs (absent in salamanders), skin, and gills
-by external gills in the larval form & may persist in life (neoteny)
What is circulation like?
with three-chambered heart (2 atria & 1 ventricle)
-double circulation through heart
-skin abundantly supplied w/blood vessels
Is it cold blooded or warm blooded
Ectothermal (cold blooded)
What is the sex like? fertilization?
-Separate sexes
In Salamander & newts :
-internal fertilization via spermatophore
In Frogs & toads:
-external fertilization
-oviparous
-eggs w/ jellylike membrane coverings
What symmetry
Bilateral
What is the phylum and subphylum
Chordata and Vertebrata
