Download bio - HO frog dissection qu

Eden High School
Grade 10 Science
Frog Dissection
Part A: An Initial Look
1. Study the frog’s skin. Describe what the skin looks and feels like.
2. Compare the feet of the frog to your own feet, for similarities and differences. Record your findings.
Part B: The Grand Opening
3. Find the blood vessels under the skin. Why are they there?
Part C: Take a Deep Breath
4. Label the position of the internal nostrils on the diagram. Draw in and label
the position of the nose passages. Label the position of the glottis on the
diagram. Label the position of the trachea, bronchi, and lungs in the
diagram.
5. Determine if the frog has a diaphragm.
6. Describe the appearance of the inside of a frog's lung.
Part D: The Food Processor
Part D: The Food Processor
7. Label the position of the teeth on the diagram.
Record which way the teeth are pointing.
8. Draw the frog's tongue, what its tip looks like, and
where it is attached to the mouth.
9. Draw in and label the position of the eyeballs
10. Label the opening of the esophagus and the
esophagus itself.
11. Label the stomach, small and large intestine,
rectum, anus
12. Label the liver, gall bladder and heart.
13. Pull out the intestine and measure how long they
are.
L.
Trace this diagram carefully into your notebooþ,
Fig.60
Part E: What Was for Lunch?
14. Describe these contents of the stomach
15. Describe how the inside of the stomach looks.
Questions:
1. How does the skin on a frog's arm or leg compare to your own?
2. How do a frog's ears compare to your own?
3. Compare the air pathway of the frog from atmosphere to lungs to your own air pathway.
4. Frogs have very few teeth, certainly not enough for chewing their food (usually flying insects). What would
a frog use its teeth for?
5. Compare where the frog's tongue is attached to where your own tongue is attached. How does this
arrangement help a frog to catch its food?
6. When a frog swallows, it depresses its eyeballs into its mouth cavity. Why would this help it swallow?
7. Compare the food pathway of the frog from mouth to anus to your own food pathway. In what other ways is
the frog's digestive system similar to your own?
8. What nutrient do you absorb into your blood through the large intestine? Why is it not necessary for a frog
to keep this nutrient in its body?