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Name: ____________________________ Block: ____ Date: ______________________
BIOLOGY 11
FROG LAB
Follow the dissection procedure in the lab manual on pages 183-186.
PART 1: Mouth (7 marks)
Label the diagram of the frog’s mouth with the following terms: vomerine teeth, maxillary
teeth, openings to the vocal sac, openings to the Eustachian tubes, gullet opening, tongue,
and glottis.
PART 2: Hind Leg Muscles (5 marks)
Sketch a diagram of the dorsal muscles of the hind leg. Label an extensor (contraction
causes a joint to straighten) and a flexor (contraction causes a joint to bend).
Name: ____________________________ Block: ____ Date: ______________________
BIOLOGY 11
PART 3: Internal structures (17 marks)
Label the diagrams of the internal anatomy below.
Name: ____________________________ Block: ____ Date: ______________________
BIOLOGY 11
PART 4: Functions of the Internal Organs (17 marks)
Digestive System
pharynx __________________________________________________________
esophagus _________________________________________________________
stomach __________________________________________________________
liver _____________________________________________________________
gall bladder stores bile_______________________________________________
pancreas __________________________________________________________
small intestine _____________________________________________________
mesentry __________________________________________________________
large intestine ______________________________________________________
cloaca ____________________________________________________________
Reproductive, Circulatory, & Excretory Systems
left atrium _________________________________________________________
right atrium ________________________________________________________
ventricle __________________________________________________________
glottis ____________________________________________________________
lungs ____________________________________________________________
ovary/testis________________________________________________________
kidneys ___________________________________________________________
bladder ___________________________________________________________
Name: ____________________________ Block: ____ Date: ______________________
BIOLOGY 11
PART 5: Discussion Questions (14 marks)
1a) What is unusual about the attachment of the tongue? __________________________
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b) What is the advantage of this attachment? __________________________________
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2. What might be the function of the vomerine teeth?______________________________
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3. How are the positions of the eyes and external nostrils appropriate for life in the water?
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4. How are the relative lengths of the frog’s small intestine and large intestine related to
their functions?
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Name: ____________________________ Block: ____ Date: ______________________
BIOLOGY 11
5. Which three body systems does the cloaca belong to and what is the function in each?
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6. How is the frog’s heart different from the hearty of a fish? _______________________
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7. The ventricle has thicker, more muscular walls than the atria. Relate this difference in
wall structure to the functions of the two types of heart chambers.
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