Phylum Annelida

• Watch video of earthworm dissection
• What is the most important characteristic of annelids?______________________

• Observe specimens:

1. Examples of class Oligochaeta

1. Examples of class Polychaeta

1. Examples of class Hirudinea

Phylum Arthropoda

What is the most important characteristic of arthropods?_______________________

1. Watch video of crayfish dissection

1. Observe crayfish. (Figure 13 on p.134 of labmanual)

1. What are the body regions in a crayfish?  ______________________________

1. How many pairs of walkinglegs?                 ____________________________

1. Does a crayfish havemandibles?          ________________________________

1. Double branched appendages are described as__________________________

1. Crayfish is a member in subphylum _______________,class_______________

1. Observe centipedes.

1. How many pairs of legs are there in each segment?______________________
2. A centipede is a member in subphylum ______________, class_____________

1. Observe millipedes.

1. How many pairs of legs are there in each segment?______________________

1. A millipede is a member in subphylum ______________, class_____________

1. Observe spiders.

1. How many body regions are there in aspider?      _______________________

1. What are the body regions?  ________________________________________

1. How many pairs of legs are there?____________________________________

1. What are the major functions of chelicerae?____________________________

1. Spiders are members in subphylum _______________, class_______________

1. Observe insects. (Figure 16 on p.136 of labmanual)

1. How many body regions are there in agrasshopper?     ____________________

1. What are the body regions?  ________________________________________

1. How many pairs of legs are there?____________________________________

1. Does an insect havemandibles?            ________________________________

1. What appendage do insects have that you have not observed inany other

invertebrates?                 _________________________________________

1. Grasshopper is a member in subphylum _______________, class___________

1. Insects go through a process of transformation from an immatureform to an

adult form. This process is called_________________________________