Name:______Date:______Class: ______

Dissection Worksheet

Carefully read each page of the Net frog dissection. You do NOT need to answer these questions in complete sentences. This packet must be completed and turned in by 4/12 in order to participate in the dissection on 4/14.

1.Why do we dissect frogs? NET FROG FIRST PAGE

2.What does the word Amphibian come from and mean? *Set-up 1: Materials Guess What?

3.What side should you make your initial cuts on your frog?

●Dorsal (toward the spine)

●Ventral (toward the belly)

4.When you make your cuts, what utensil might you use to make your first cut? (Two acceptable answers) *Incision 1: Skin First

5.Using your notes (Chapter 12), what type of symmetry do frogs have?

6.Most other cuts you will use what utensil? *Incision 1: Skin First

7.Amphibians are warm blooded *Incision 1: Skin First GW?

●True

●False

8.Your initial cuts are made to form what Capital Letter? **Incision 1: Skin First Video if possible or look at picture on p. 4 of Dissection packet*

9.What causes the frog’s skin to feel so smooth and slippery? *Incision 2: Skin Horizontal*

10.The skin of the frog differs from humans because it carries out an extra function, what is it? * Incision 2: Skin Horizontal GW?

11. If the frog has no diaphragm to pull in the air, then air/oxygen must move across the skin membrane from high to low concentration in a process called what?

  1. Osmosisc. Diffusion
  2. Dissectiond. Homeostasis

12.Why must you be careful not to cut too deep when dissecting the frog? *Incision 4: First Muscle Incision*

a.Deep cuts will make him bleed a whole lot

b.Deep cuts could destroy his organs

c.Deep cuts may cut all the way through his whole body

13.How far can a frog jump? *Incision 5: Chest Bone

14.The back legs of the frog are more muscular, and stronger. List at least two advantages to this. *Incision 5: Chest Bone

15.The tympanum is the same as what in humans? * Incision 7: Muscle Separates GW?

16. You should now be on Organs 1: Introduction

Please read carefully and be sure to look at all pictures to help you identify the organs when we have the frogs.

System / Notes (location and purpose)/sketches
Digestive System
●Tongue
●Liver
●Gall Bladder
●Esophagus
●Stomach
●Intestines
Respiratory System
●Lungs
Circulatory System
●Heart
●Spleen
Reproductive System
●Testes (Male)
●Ovaducts (F)
●Ovaries/eggs
Excretory System
●Kidneys
Nervous System
●Brain
Muscular System
●Muscle
Skeletal System
●Bone

17. Write down any questions or concerns you may have about the dissection: