What kind of circulatory system do amphibians have?
Closed circulatory system
What kind of blood is pumped to the body parts of amphibians?
Partially oxygenated blood
What are pulmonary veins?
Vessels that carry oxygenated blood from lungs to the heart
What amphibian lacks legs?
Lungs are believed to have evolved from what?
Evolved from swim bladder of bony fish
Describe how amphibians breathe?
Breathe by lowering the floor of the mouth to draw in air, then raise it to push air
What kind of fertilization do apoda undergo?
Describe the anterior of apoda?
Have jaws with teeth
T/F Caecilians lack eyes.
False they have small eyes
Where do apoda tend to live?
Tropical environments, burrowing underground
What kind of skin is moist?
How does the mexican salamander breathe?
The mexican salamander is also known as?
What part of an amphibian's heart has deoxygenated blood?
What part of an amphibian's heart h
Describe the outer layer of tiktaalik?
Gills, and scales like fish
What was the ichthyostega?
T/F Tiktaalik had gills and scales like fish but neck like amphibians.
Describe the limbs of ichthyostega?
Sturdy forelimbs to support weig
How are anura eggs fertilized?
T/F Toad eggs laid in water have a watertight membrane but frog eggs lack this
False both eggs lack watertight membrance
Describe how/where anura are birthed?
Oviparous with eggs laid in wate
Amphibians were the first vertebrates to do what?
Walk on land
Amphibians evolved from what?
Evolved from lobed finned fish
What is tiktaalik?
Transitional fossil between fish and first amphibian
What had gills and scales like fish but neck like amphibia
What are anura eyes covered by? Function?
Anura eyes are covered by Nictitating membrane which is a type of transparent
moveable membrane. The Nictitating membrane protects the eyes and keeps
What 2 senses are well developed in anura? What are
T/F Newts have long bodies, tails, and smooth and moist skin.
False, newts have dry skin
T/F Most frogs and all toads have poison glands that secrete a range of toxins.
False, some frogs and toads have posion glands
What is unique about marsupial frogs?
What appendage was needed for vertebrates to enter land? Function?
Legs were needed to support body's weight
What organ was needed for vertebrates to enter land? Function?
Lungs were needed to extract oxygen from air
What happened to the heart for land v