Name: ________________________________________ Period: ______ Due Date: _________
You will need to choose 3 assignments to complete from the Tic-Tac-Toe board below.
You must choose the middle block and you should make Tic-Tac-Toe with your other
choices if possible. Please indicate the choices you have made by placing your initials in
your 3 boxes on the board below and attach your work, or proof of your work when you
submit your crayfish materials. **If you have another idea for one of the blocks,
please see Mrs. Lock. The middle block is not, but some blocks may be negotiable.
Read the lab and make a
list of every structure you
need to label on your
diagrams. Write the
function (job) of each next
to its name. (attach your
list to your packet)
Read the lab and make
flashcards for each
structure you need to
label on your diagrams.
The name should go on
the front and the function
should go on the back.
(attach your flashcards to
your packet)
Read the lab and draw
sketches of the structures
you will need to label on
your diagrams. Write the
name of each structure
beneath the sketch. (use
the descriptions, your text
and the materials on your
tables to help you)
Read the lab and highlight
every structure you need
to label on your diagrams.
Underline the function of
each structure.
Complete the virtual or
physical crayfish
dissection. Answer the
questions, label the
diagrams and write the
conclusion.
Write a short poem or
song that follows the path
of food through a crayfish
from mouth to anus.
Obtain an article about
crayfish or some other
arthropod from Mrs. Lock.
Create a crossword puzzle
Read the article and
about the crayfish using
summarize it in one
the structures you labeled
paragraph. Then, in a
as the answers and their
second paragraph,
functions as the clues.
describe the adaptations
that arthropod has to be
successful.
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Use a good science
website to find an article
about an arthropod.
Summarize the contents
of the article in a
paragraph, or make your
own illustration/picture
for this article.
Please answer the following questions in
complete sentences.
EXTERNAL ANATOMY:
1.
How many segments does the crayfish have in its abdomen?(don’t count the
2.
What is the structural difference between a compound eye and your eye?
3.
What is the difference in structure of the antennae and antennules?
4.
How many antennae does the crayfish have?
5.
What is the difference between the function of the antennae and antennules?
6.
Describe the structure of the mandibles.
7.
In which direction do the mandibles move?
8.
How is this different from the way your jaws move?
9.
How does the shape of the maxillipeds differ from the walking legs?
telson and uropod)
10. How is the cheliped shaped to fit its function?
11. How do the walking legs differ in shape as you move from front to back?
12. What are the functions of the appendages that are found on the cephalothorax? (all of
the ones you have already observed; use a sentence or 2 to describe these)
13. What is the sex of your crayfish? (male or female; NOT boy or girl!)
14. How did you determine the sex of your crayfish (what structures did it possess)?
15. How did you see that form fits function in the crayfish appendages? (2 PTS)
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Crayfish External Anatomy
(Section of the body)
(Section of the body)
INTERNAL ANATOMY:
16. Why are the gills branched (think about their function)? (2 PTS)
17. To which structures are the gills attached?
18. What is the advantage of the gills being attached to the walking legs? (2 PTS)
19. How do the digestive glands help with digestion?
20. Why is it good to have the digestive glands attached to the intestine? (2 PTS)
21. How do the hard, tooth-like structures aid the stomach in digestion? (2 PTS)
22. What color are the green glands? (They are NOT green.)
23. What is the function of the green glands?
24. Why is the nerve cord on the bottom of its body? (2 PTS)
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CRAYFISH CONCLUSION: (10 PTS)
You have just finished examining the internal and external crayfish anatomy. Looking
back on this dissection and observation, please write a 3-paragraph conclusion on a
separate sheet of paper using the following outline:
 Paragraph 1:
 What is an invertebrate
 What is an arthropod
 Thesis/topic sentence that tells why we are dissection crayfish (think
about the first 2 parts of his paragraph)
 Paragraph 2:
 Symmetry
 Organs
 Digestion
 Movement
 Paragraph 3:
 How does “Form fit function” in the crayfish?
 Why is the arthropod considered advanced?
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