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Chordata

The phylum name for any animal with a skull and backbone

vertebrae

Responsible for surrounding and protecting an animal's nerve cord

cartilage

The skeletal structures of all vertebrate embryos are made of this

endotherm

An animal that maintains a constant body temperature, even if the environment changes

ectotherm

An animal whose body temperature changes if the surrounding environment does

lungs

These structures must have developed in order for amphibians to live and get oxygen on land

fish

Amphibians evolved directly from these animals

amphibian

This word means "double life"

amphibian

These were the first animals to be able to live most of their lives on land

skin

Instead of using lungs or gills, some amphibians get oxgen by using this organ

metamorphosis

The change from a larval form to an adult

tadpoles

These amphibian embryos have gills and do not have legs (yet)

caecilians

These amphibians have no legs and are shaped like a snake

salamanders

These amphibians look the most like prehistoric ones

salamanders

These amphibians have a tail and four legs

tympanic membrane

These structures allow for a frog to hear

nostrils

These holes are found on the roof of a frog's mouth next to the vomarine teeth

vomarine

These two teeth are positioned on the roof of a frog's mouth

maxillary

These frog teeth are around the outer edge of the upper part of a frog's mouth

esophagus

This tube leads from a frog's mouth to its stomach

front

A frog's tongue attaches to this part of its mouth

heart

This organ pumps blood and is made up of two atria and one ventricle

lungs

These stretchy respiratory organs are positioned on either side of the heart.

liver

The job of this organ is to filter blood and produce bile, which breaks down fats and stores sugars

gallbladder

This greenish sac is found between the lobes of the liver

gallbladder

The function of this organ is to store bile

stomach

This is the first organ of digestion for a frog

small intestine

Chemical digestion and absorption takes place in this organ

large intestine

This organ collects food that cannot be digested

small intestine

This organ comes right after the stomach

spleen

This reddish-brown spherical organ is found in the mesentary that holds the small and large intestine

spleen

This organ breaks down old blood cells and produces new ones

cloaca

This is where the digestive, urogenital, and reproductive systems end in a frog

cloaca

This is another name for a frog's anus

thumb

Externally, to tell whether a frog is a male or female, you would examine the size of this structure

kidneys

These organs filter wastes from the blood and excrete them as urine

kidneys

These organs are located on the dorsal wall of the frog. Fat bodies and reproductive organs are attached to them

ureter

This tube connects the kidney to the bladder

bladder

This flap-like structure collects urine

ovaries

These organs produce eggs in female frogs

testes

These organs produce sperm in male frogs

endotherm

Another name for "warm-blooded"

ectotherm

Another name for "cold-blooded"

fat bodies

These yellowish and finger-like organs store fat that frogs use during hibernation

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