pentaradial symmetry
Five-armed body plan
Pentaradial symmetry is a body plan organized around five equal sections radiating from a central point, like spokes on a wheel.
This arrangement is characteristic of echinoderms—starfish, sea urchins, sand dollars, and their relatives.
The term appears primarily in biology and marine science: Sea stars display classic pentaradial symmetry.
- sea starsRadially symmetric marine echinoderms
- echinodermsSpiny-skinned marine invertebrates
- armsUpper body limbs
- fivefoldFive times as much
- ossiclesMinute skeletal structures
locomotion · Cambrian explosion · larval stage · brittle stars · Asteroidea · tidal pools · tube feet · sea urchins · regeneration · sand dollars · ocean floor · deep sea · starfish · structural stability · wheel · marine ecosystems · tentacles · spiny
- body planbody plan, segmentation, body segments, body cavity, coelom
- echinodermssea urchin, echinoderm, sea star, sea cucumber, brittle star