It depends what you're comparing them to. Here's a list some of the parts of a starfish: radial canal ring canal stone canal stomach reproductive glands digestive glands water vasculatory system optic cushion tube feet madreporite
starfish are cool and should have organ systems cause organ systems are also cool
tubefeet
Starfish don't have a heart, or a brain...
it is connected to the back in the hole
A starfish usualy eats mussels, clams, and arteres
Starfish have suction-like cups helps to open clams
they have pinchers on their back that pinch anything that it doesnt like
The gonads of a starfish appear larger when it is mating season.
it helps eat predators and other things and digests the food it eats
The organ in both fish and clams that serves a similar function to the papulae of starfish is the gills. Gills are responsible for gas exchange, allowing aquatic animals to absorb oxygen from the water and expel carbon dioxide. In starfish, papulae also facilitate gas exchange and help in excretion, functioning similarly to gills in terms of respiratory processes.
The parts of a starfish that are visible are its upper side, known as the aboral surface, which contains the madreporite (water-filtering organ) and the spines, tube feet, and pedicellariae (small pincers).
The eyespot on a starfish is a simple light-sensitive organ located at the tip of each arm. It allows the starfish to detect changes in light intensity and direction, helping it navigate its environment. While it does not provide detailed vision, this ability aids in finding food and avoiding predators. The eyespots contribute to the starfish's overall sensory perception, enhancing its survival in the ocean.