Consider the movement of water through the water-vascular system in starfish. Rearrange the following statements in order with 1 representing the first step. The following photo might be of help.   1: 1 2: 2 3: 3 4: 4匹配题

From the ring canal, radial canals run outward through each arm. Lateral canals connect these radial canals to ampulla that lie at the base of tube feet.

When the ampulla contracts, the fluid is prevented from entering the radial canals by a one-way valve and is forced into the tube foot, thus extending it.

Water enters the system through the madreporite.

Water then flows through the stone canal to the central ring canal.