Holds all limbs together
It is the part that extends from the ring canal, all the way to the tip of the starfish. It's under the gonad.
They connect the radial canal to the ampullae in the water vascular system.
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
The madreporic canal of a starfish is often referred to as the stone canal because it is a rigid, calcified structure that connects the madreporite, a porous plate on the starfish's body, to the ring canal. This canal plays a crucial role in the water vascular system, allowing seawater to enter and circulate, which is essential for locomotion and feeding. The term "stone" reflects its hardened, mineralized composition, distinguishing it from softer tissues.
the stone canal connects the madreporite to the ring canal and the ring canal allows water to flow into the radial canals, just tubes...
Its a canal :)
Its a canal :)
Water comes into the system via the madreporite. It is then circulated from the stone canal to the ring canal and into the radial canals. The radial canals carry water to the ampullae and provide suction to the tube feet. The tube feet latch on to surfaces and move in a wave, with one body section attaching to the surfaces as another releases.
The function of the central disk on the starfish is to regrow an appendage if one is cut off. It is where the arms of the starfish originate.
To poop.
The function of the ambulacral groove on a starfish is to open the shells of bivalves. It also hold the tubed feet of the starfish.
dont care