Arthropoda are characterized by having jointed appendages, bilateral symmetry, and an exoskeleton. They have segmented bodies divided into three parts - head, thorax, and abdomen. Respiration occurs through general body surfaces, gills, tracheae, or book lungs. The nervous system features a dorsal brain connected to a ventral nerve cord. Reproduction is sexual with separate sexes and sexual dimorphism present. Examples include Daphnia, Palaemon, Julus, and mosquitoes.

1. General characteristics of Arthropoda
Dr. BGR
General characteristics
of
Arthropoda

2. Agenda
Introduction
Key Characteristics
General Characteristics
Example
Summary

3. Introduction
Arthros; Jointed,
podos; Foot

4. Key Personality
Jointed appendage

5. Scientific classification
Kingdom: Animalia
Note
All animals are members of the Animalia

6. Habitat
mostly terrestrial, also aquatic
Note
Habitat: Natural environment of an animal

7. Symmetry
bilateral symmetry
Note Symmetry: Repetition of the parts in an animal

8. Coelom
haemocoel
Note
Body cavity: true coelom, often divided by internal septa

9. Grade of organization
organ system grade

10. Body
Three-part:
head, thorax, abdomen

11. Compound eyes
contain several thousand
lenses leading to a larger
field of vision

12. Germ layer
triploblastic
Germ layer
endoderm
(inner layer)
ectoderm
(outer layer)
mesoderm
(middle layer)
Note
Tri: Three (3)

13. legs
Three pairs of jointed legs (6
legs)

14. Respiration
by general body surface,
by gills, tracheae or book
lungs

15. Nervous system
dorsal brain with ventral nerve cord

16. Circulatory system
open type with dorsal heart

17. Excretion
malpighian tubules / green gland

18. Reproduction
Sexes are separate.
Sexually dimorphism is present
Reproduction
Sexual Asexual

19. Fertilization
Internal
Fertilization
Internal external

20. Development
direct / indirect with larval stages

21. Example
Daphnia,
Palaemon,
Julus,
Scolopendra,
Tabernus,
Mosquitoes,
Ants,
Aramea,
Limulus

22. Summary
Jointed appendage

23. Thank You
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