Lab Practical Study Guide (Crayfish & Fetal Pig)

Question 1

Name the kingdom, phylum, and class of the crayfish.

Answer 1

Kingdom: Animalia Phylum: Arthropoda Class: Crustacea

Question 2

Identify the chelipeds.

Answer 2

7

Question 3

Identify the compound eyes.

Answer 3

3

Question 4

Identify the antennae.

Answer 4

2

Question 5

Identify the antennules.

Answer 5

1

Question 6

Identify the mouthparts.

Answer 6

3. mandibles
4. second maxilae
5. first maxillipeds
6. second maxillipeds
7. third maxillipeds

(first maxillae are covered by second maxillae)

(Probably only need to know mandibles)

Question 7

What is the cephalothorax?

Answer 7

The fused head & body of the crayfish

Question 8

What is the abdomen?

Answer 8

Basically the tail of the crayfish

Question 9

Identify uropods and telson.

Answer 9

6. uropods
7. telson

Question 10

Identify the swimmerets.

Answer 10

1

Question 11

Identify the walking legs.

Answer 11

5, 6, and 7

Question 12

Identify the carapace.

Answer 12

5

Question 13

Identify the ventral, dorsal, anterior, and posterior sides of a crayfish.

Answer 13

Question 14

What are 3 distinguishing features of arthropods?

Answer 14

Exoskeleton

Jointed appendages

Segmented bodies

Question 15

How many body segments does a crayfish have? Name them.

Answer 15

2. Cephalothorax and Abdomen

Question 16

Differentiate between a male and female crayfish.

Answer 16

In males, the first pair of swimmerets is enlarged.