# data[].attributes.body
Have hair and fur on the body.

Have mammary glands.

Four chambered hearts.

Have heterodont dentation (different types of teeth)

Posses diaphragm.

# data[].attributes.body
Amphibians are cold-bloodedanimals, meaning they do not have a constant bodytemperature but instead take on the temperature of their environment. They have moist, scaleless skinthat absorbs water and oxygen, but that also makes them vulnerable to dehydration

# data[].attributes.body
All reptiles have a backbone, which means they are vertebrates.

All reptiles produce eggs. Most reptiles lay hard-shelled eggs, but a few give birth to live young.

All reptiles have scales or scutes.

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The fishdo not maintain a constant internal body temperature; instead, their temperature is greatly influenced by their environment. True fish have a backbone and fins. Most also breathe with gills and have scales that cover their bodies.

# data[].attributes.body
Birds are endothermic and, because they fly, they require large amounts of energy, necessitating a high metabolic rate. As with mammals, which are also endothermic, birds have an insulating covering that keeps heat in the body: feathers.