morphology of a starfish
Starfish: carnivorous echinoderm found in the ocean depths; it generally has five arms, which allow it to crawl slowly along surfaces.
Central region of the body; the starfish’s arms are attached to it.
More or less movable outgrowths of calcareous plates forming the skeleton and enabling the starfish to ward off its predators.
Small light-sensitive structure located at the terminal end of each arm, allowing it to locate surfaces and prey.
Porous dorsal plate that allows water to enter the body; it connects the ambulacral ossicle to the outside world, and thus ensures locomotion.
Movable appendage radiating around the central disk; it has a mainly tactile and olfactory function. The starfish can regenerate an amputated arm.