The Frog

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The Frog
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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!

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Main Organs

• Liver
• Kidneys
• Eyes
• Brain
• Lungs
• Heart
• Write them down and where each is located!

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Digestive System

• Eyes Why the eyes??
• Brain
• Stomach
• Small Intestine
• Large Intestine

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Nervous System

• Eyes
• Brain
• Nerves

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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

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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 cant be expressed in the flat
  format of a book or computer monitor.

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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.
• Weve discussed ethics in science.

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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.

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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.