How does the respiratory system change as the frog undergoes metamorphosis from a tadpole to an adult frog?Here's the whole question (it's a lab question):
Describe mating in frogs and the stages of frog development. How does the respiratory system change as the frog undergoes metamorphosis from a tadpole to an adult frog?
Any help would be greatly appreciated!! Please and thank you~
Posted by Yaybob
from gills to lungs
The tadpole is the aquatic larval form of the amphibian (frog in this case), a descendent of the fish which retains its gill apparatus for extacting dissolved oxygen from the water.
After metamorphosis, the frog switches over to an air-breathing lung system and hops onto the land
From http://en.wikipedia.org/wiki/Amphibian
"The most obvious part of the amphibian metamorphosis is the [1] formation of four legs in order to support the body on land. But there are several other changes: [2] the gills are replaced by other respiratory organs, i.e., lungs, [3] the skin changes and develops glands to avoid dehydration, [4] the eyes develop eyelids and adapt to vision outside the water, [5] an eardrum is developed to lock the middle ear and [6] the tail disappears. .
Posted by ScSpec
During the tadpole stage of the amphibian life cycle, most breathe by means of autonomous external or internal gills. As tadpoles mature, they most commonly metamorphose by gradually growing limbs and then (most commonly in the case of frogs) outwardly absorbing its tail by apoptosis. Lungs develop around the time of leg development and tadpoles late in development will often be found near the surface of the water where they breath air.
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