PHYLUM ACANTHOCEPHALA

 

                    CHARACTERISTICS OF MAJOR ANIMAL PHYLA

                                                             

 

 

          SYSTEM                     TYPE/REMARKS

 

1.  Circulatory               None. Exchange by Diffusion

2.  Respiratory               None.  Exchange by Diffusion

3.  Excretory                           Protonephridia With Flame Cells That Unite To Form A Common Tube That Opens Into Sperm Duct Or Uterus

4.  Digestive                            None.  Absorption Is Through Tegument

5.  Skeletal                     None.

6.  Nervous                    Central Ganglion Within The Proboscis Receptacle

7.  Type of Coelom                 Pseudocoelomate

8.  Muscular                            Body Wall With Circular And Longitudinal Muscles

9.  Reproductive            Egg layers, Dioecious

 

 

 

                                                MAJOR GROUPS

 

 

CLASS EOACANTHOCEPHALA

CLASS PALAEACANTHOCEPHALA

CLASS ARCHIANTHOCEPHALA