Northern Leopard Frogs
Why Study Frogs?
Frogs are important to research and medical
laboratories because their skeletal, muscular,
digestive, nervous, and other systems are
similar to those of higher animals. So, if you
see a leopard frog don't think of its as just a
common frog, think of it as one of nature's
representatives.
NORTHERN LEOPARD FROG
• One of the most commonly dissected frogs
• widely collected for the food industry
• Females are larger than males
• brown to green with three rows of
irregularly arranged black spots.
• spots are usually outlined in a cream
colored border.
• Although the dorsal surface of this frog is
very colorful, the belly and undersides of
the legs are pale white.
WHAT DOES THE NORTHERN LEOPARD
FROG EAT?
• insects, earthworms, other frogs, snails,
spiders, and other small animals.
• can even eat small mice and fish! Their
favorite time to hunt is in overcast, rainy
conditions.
Leopard Frog Habitat
Most leopard frogs are found in clean
groundwater near lightly wooded areas with
significant vegetation.
Where Are Leopard Frogs Found?
Leopard Frogs are found in all provinces of
Canada and within the United States. Declines
in northern leopard frog populations were first
noticed in the early 1970s.
Differences Between
Frog & Human Digestive Systems
• Short gullet instead of esophagus
• Undigested food goes into cloaca and out the anus
Circulatory System Differences
• Heart has 3 chambers in a frog
• 2 atria and 1 ventricle
Excretory System Differences
• Most carbon dioxide leaves through the skin, not
the mouth
• Urine goes from bladder to cloaca and out the
anus
Respiratory System Differences
• Do not have a diaphragm
• Moves air into lungs by swallowing air
Reproductive System Differences
• Male frog – testes and oviducts
• Female frog – ovaries and oviducts
• Oviducts transport sperm & eggs to the cloaca and
out the anus
Placing Frog on Tray
Exposing The Organs 1
Exposing the Organs 2
Liver and gall bladder
Heart
Lungs
Kidneys