Amphibians by Darlene Saavedra

Anura

25dsaavedrabermudez — 2024-05-10 16:52:02 UTC

25dsaavedrabermudez — 2024-05-10 16:52:34 UTC

There are 4500 species known

Defenses:

25dsaavedrabermudez — 2024-05-10 16:53:29 UTC

Frogs mostly get rid of their predators through their jumping skills. Additionally, they have parotid glands near their head that secrete mucus and other toxic substances.

Evolutionary features:

25dsaavedrabermudez — 2024-05-10 17:42:10 UTC

most of their body structures have evolved to help them jump. Frogs have long back legs and smooth, slimy skin. Toads have shorter limbs and rough skin. The tadpole goes through metamorphosis to form an adult frog. They have a visible tympanic membrane on each side of their head

Urodela:

25dsaavedrabermudez — 2024-05-10 17:50:51 UTC

25dsaavedrabermudez — 2024-05-10 17:53:58 UTC

There are around 620 species

Defenses:

25dsaavedrabermudez — 2024-05-10 17:55:25 UTC

Salamanders have a soft body with slimy skin. This acts as a line of defence to escape the predators. Secondly, they have organs on their tail that secrete poisonous substances to keep the predators away. Their fertilisation is mostly internal.

Evolutionary features:

25dsaavedrabermudez — 2024-05-10 17:58:04 UTC

They can respire through gills, lungs, skin and oral cavity. They develop gills at the larval stage which can either remain through their entire life or can be shed after metamorphosis. Lungs in adult salamanders are not as complex as mammals, they are simple and sac-like. They have four limbs in two pairs, the most developed among all amphibians. They lack middle ear cavities but can sense airborne vibrations.

Apoda

25dsaavedrabermudez — 2024-05-11 18:01:07 UTC

25dsaavedrabermudez — 2024-05-11 18:06:00 UTC

There are about 189 species

Defenses:

25dsaavedrabermudez — 2024-05-11 18:08:40 UTC

They don't have any limbs so they are fossorial. They don’t face much predation.

Evolutionary features:

25dsaavedrabermudez — 2024-05-11 18:25:00 UTC

They have cylindrical bodies with annular rings. They completely lack limbs. They have bony skulls that help in burrowing. Their eyes are covered by skin in most of them; they lack middle and outer ear cavities but can detect low-frequency sounds. The caecilians lack functional bone marrow, and hence are dependent on liver, kidney and spleen for blood cell production.