Across
- 3. canal system is larger than asconoid
- 4. know as collar cells
- 6. ate the simplest animals
- 7. the head region vontains light sensitive organs
- 10. sre those that lack the vertebral columnas the supporting structure
- 13. forms the epidermis
- 14. is a tubular sessile form
- 15. are found mostly in marine environments
- 16. in between the germ layers in gelatinous matrix
- 17. is the largest and most complex canal system
- 19. symmetry is a body plan where the body parts are arranged circularly
Down
- 1. have unsegmented bodies that are flat
- 2. is a canal system that is shaped lika asimple tube perforated by pores
- 5. animals with regular body
- 8. is a body plan where the body parts are arranged equally
- 9. forms the endodermis or gastrodermis
- 11. animals with irregular body
- 12. they are call iternal bud
- 16. is lika an umbrellalike form that is free swimming
- 18. they thrive in moist damp places and in a freshwater habitat