Reptile vs Amphibian

By Jordyn Lewis and Zarah Punjwani

Reptiles

Reptiles are cold blooded meaning they don't maintain a constant body temperature. Most reptiles have skin covered in dry, flaky scales. Reptiles are born in land & with strong instincts so they do not have parents. They also do not go through a larvae stage. Most reptiles are born with lungs.


4 MAIN GROUPS OF REPTILES:


  • Turtles & tortoises
  • Lizards & snakes
  • Crocodiles & alligators
  • Tuatra

Amphibians

Amphibians are cold blooded animals that can live in or out of water. All amphibians start their life in the water with gills. Amphibians go through metamorphosis. Some amphibians breath through their skin. Amphibians are vertebrates of the taxonomic class Amphibia including animals such as frogs and toads. Amphibians are generally small with thin skin permeable to air and water. With few exceptions, amphibians do not actively care for their young. In general, amphibian reproduction strategy consists of egg-laying and external fertilization of a large number of eggs in a moist or fully aquatic environment.

Main Groups of Amphibians:

. Newts and Salamanders

.Frogs and Toads

. Caecilins

Whats the difference?

One difference is between the structures of their skin. Reptiles are covered with scales, shields, or plates and their toes have claws. Amphibians, on the other hand, have wet, glandular skins, and their toes lack claws. Another difference is between the eggs. Eggs of reptiles have a thick, solid covering that protects the developing embryo from moisture loss, even on dry land. In contrast, the eggs of amphibians lack a hard outer covering.

How are they the same?

The brief taxonomic similarity between reptiles and amphibians consists of:

  • Domain: Eukarya – Cells that contain a nucleus and other organelles encapsulated within membranes.
  • Kingdom: Animalia
  • Phylum: Chordata - animals whose members have a single dorsal nerve cord, notochord and gill slits at some stage of development.

Respiration

Breathing is via lungs however; aquatic turtles have the ability to do a limited gas exchange underwater primarily during extended periods of cold temperature or inactivity. The gas exchange, depending upon species, is through skin, throat or the anal region where capillary blood vessels absorb oxygen. Most amphibians conduct gas exchange through skin called cutaneous respiration.

Skin

The color of the skin can be altered via the concentration or dissipation of melanin. Color alteration aids in thermoregulation and camouflage.

Longevity

80+ years is possible for both reptiles and amphibians. "Similarities Between Reptiles and Amphibians." Similarities Between Reptiles and Amphibians.