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Development of capillaries in the regenerating tail of a tadpole. a b c d, sprouts and cords of protoplasm.

Development of Capillaries of a Tadpole

Development of capillaries in the regenerating tail of a tadpole. a b c d, sprouts and cords of protoplasm.

Development of capillaries in the regenerating tail of a tadpole. a b c d, sprouts and cords of protoplasm. The sprouts and cords of protoplasm have become channeled out into capillaries.

Development of Capillaries of a Tadpole

Development of capillaries in the regenerating tail of a tadpole. a b c d, sprouts and cords of protoplasm.…

A genus of fishes whose branchial apertures are close together below, and are surrounded by a lip-like margin.

Chilobranchus

A genus of fishes whose branchial apertures are close together below, and are surrounded by a lip-like…

The foot of a frog, which is useful in and out of water.

Frog Foot

The foot of a frog, which is useful in and out of water.

Frogs are found all over the world, except Antarctica.

Frog

Frogs are found all over the world, except Antarctica.

A full grown frog.

Frog

A full grown frog.

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Frog Egg

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Frog Eggs

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"Life history of a frog. Tadpoles with both pairs of limbs apparent." -Thomson, 1916

Frog Stage 4

"Life history of a frog. Tadpoles with both pairs of limbs apparent." -Thomson, 1916

"Life history of a frog. Metamorphosis to frog." -Thomson, 1916

Frog Stage 5

"Life history of a frog. Metamorphosis to frog." -Thomson, 1916

Nearing the end of its development, a gradually shrinking tail is all that remains of the tadpole.

Frog with tail

Nearing the end of its development, a gradually shrinking tail is all that remains of the tadpole.

A diagram showing the motions a young frog makes while swimming. In this stage of life, the frog makes ellipses in order to move through the water.

Ellipses of Swimming Frog

A diagram showing the motions a young frog makes while swimming. In this stage of life, the frog makes…

A diagram showing the motions a young frog makes whilst swimming. In this stage of the frog's life, the frog uses looping motions to move through the water.

Loops of Swimming Frog

A diagram showing the motions a young frog makes whilst swimming. In this stage of the frog's life,…

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the frog makes waved lines while moving through the water.

Swim Lines of Frog

A diagram demonstrating the motion a frog makes whilst swimming. In this stage of the frog's life, the…

A pollywog, another phase of tadpole development.

Pollywog

A pollywog, another phase of tadpole development.

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Tadpole

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ of the urodela, which undergo a much less complete metamorphosis. At first the young have no respiratory organs or limbs. They are all head and tail with simple entire gills which soon disappear, to be followed by others of more complicated structure, situated within the cavity of the body as in fishes. After a certain length of time the hind legs begin to appear, the head becomes more developed, and the body assumes a more compact form. Still later the forelegs are found to exist fully formed beneath the skin and ready ultimately to burst forth. The tadpole at first seems to derive its subsistence from the fluid absorbed within its body and on the surface, but soon begins to seek its food amidst softened or decomposing vegetable matter. From that period the tadpole begins to assume more and more the appearance of a frog. Toes appear on its hind legs, the tail very rapidly disappears by absorption, and finally the fore-legs become fully developed and the metamorphosis of the tadpole is completed."—(Charles Leonard-Stuart, 1911)

Tadpole

"The Tadpole is the larva of the anurous amphibia, sometimes so far extended as to include larvaæ…

A developing tadpole.

A developing tadpole

A developing tadpole.

A developing tadpole.

Developing tadpole

A developing tadpole.

A developing tadpole.

Developing tadpole

A developing tadpole.

A tadpole developing, with small rear legs beginning to form.

Developing tadpole

A tadpole developing, with small rear legs beginning to form.

A close up view of the head of a developing embryonic tadpole.

A developing tadpole's head

A close up view of the head of a developing embryonic tadpole.

The illustration is showing both inside and outside view of the tadpole. The left inside view shows the tadpole with two front legs, heart, intestines, and gills. The right image shows the tadpole with frog like features with forelegs, back legs, and a tail.

Inside and Outside View of Tadpole During Metamorphosis

The illustration is showing both inside and outside view of the tadpole. The left inside view shows…

"Figure 5 shows the form of the tadpole when first hatched, which usually takes place about four weeks after depositing the egg." — Goodrich. 1859

Newly hatched tadpole

"Figure 5 shows the form of the tadpole when first hatched, which usually takes place about four weeks…

The development of a toad, image 1.

Toad

The development of a toad, image 1.

The development of a toad, image 3.

Toad

The development of a toad, image 3.

The development of a toad, image 4.

Toad

The development of a toad, image 4.

The development of a toad, image 5.

Toad

The development of a toad, image 5.

Toads have thicker skin than frogs.

Toad

Toads have thicker skin than frogs.