Amphibian general
What are adaptations in an ancestral group allow a shift to new functions which are later favored by natural selection
Preadaptation
Supply lubricant that keeps a frogs skin moist
Mucous glands
Middle portion of small intestine
Ileum
Group of extinct reptiles
Dinosuars
Lining of lungs may be folded into small sacs called
Alveoli
First amphibians to spend a significant part of their life on land most likely evolved from
Lobe-finned fish
Carries deoxygenated blood from the heart to the lungs and back
Pulmonary circulation
Holds the small intestine in place
Mesentary
Have a hard protective shell
Turtle
Control of body temperature
Thermoregulation
Lobe finned fish had a bone structure within their fins that act as
Legs
Carries oxygenated blood from the heart to the body and back
Systemic circulation
Transparent moveable membrane covering frogs eyes
Nictitating membrane
Sense organ on roof of mouth
Jacob sons organ
Warms body by absorbing heat
Ectotherms
Have elongated bodies, long tails, and smooth skin
Salamanders
Mechanism that pumps air into the lungs
Positive pressure breathing
Sound sensing organ
Tympanic membrane
top layer of shell
Carapace
Metabolism generates heat
Endotherms
Tailed larvae of frogs
Tadpole
Upper portion of small intestine
Duodenum
Small bone that extends between the tympanic membrane and inner ear
Columella
Lower part of shell
Plastron
Most reptiles skin have
Scales