The Frog
Skeletal System
• Notice the names of the leg bones.
– Same as ours!
• We will be looking at the bones as time
permits at the end of the dissection.
• You do not want to cut through
unnecessary bones, so BE CAREFUL!
Main Organs
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•
•
•
•
•
Liver
Kidneys
Eyes
Brain
Lungs
Heart
• Write them down and where each is located!
Digestive System
•
•
•
•
•
Eyes……
Why the eyes??
Brain
Stomach
Small Intestine
Large Intestine
Nervous System
• Eyes
• Brain
• Nerves
Things to look for
• You may notice;
– Parasites
– Worms
– Partially digested food
– Missing digits, wound or defect
– Females may be full of eggs
– Male vs. Female differences
• What are they? Discuss
Why Dissection is Important
• Pictures of frog dissection
cannot replace a real life
experience. A hands-on lab
allows a student to understand
the true positioning and feel for
organs that just can’t be
expressed in the flat format of a
book or computer monitor.
Students learn Respect for Life
• Any specimen lab, whether it is a fetal pig
dissection, or an earthworm dissection,
teaches respect for life.
• Unnecessary damage to a preserved
specimen is never allowed even though
the animal has already been humanely
euthanized.
• We’ve discussed ethics in science.
Skills that are Life Long
• They learn proper dissection skills
that will be helpful in higher level lab
classes.
• Learning the proper procedure for
frog dissection teaches following
directions, observation skills, fine
motor skills, the interrelationship
between organs and tissue.
And Remember…
The photo above was taken at the edge of a pond in
Tucson, AZ. Evidently, the Bullfrogs hide underneath the
green scum on the pond and ambush birds. Note that its
front legs are gripping the bird and forcing it down somewhat similar to the cartoon. It takes a couple of hours
for the frog to swallow the bird.