arthropods

1. Chrustacea (crustaceans)

Head and legs and abdomen together. Respiration with gills and diffusion. Example: shrimp, crab, small crab

2. Myriapoda (millipedes)

Elongated cylindrical body, consisting of the head and body back.

3. Insecta (insects)

Body consisting of: head, thorax, and abdomen. The head has a pair of antennae, thorax with three pairs of legs.

4. Arachnoidea

Consists of four orders:

a. Scorpionidae: Heterometros cyneus (scorpion)

b. Opalionidae: Take-take (long leg)

c. Arachnidae: Heteropoda venatoria (spider hunter)

d. Acarina: Dermacentor (dog ticks).