Question

match the item with the structure of the starfish.
image of starfish structure
:: madreporite :: anus
:: central disc

Explanation:

To solve this matching problem, we recall the structures of a starfish:

• Anus: The anus is located on the aboral (top) surface, often near the center. In the diagram, the top - most circular structure (with the surrounding textured area) corresponds to the anus as it is typically positioned on the aboral side and near the central region.
• Madreporite: The madreporite is a small, circular, porous structure on the aboral surface that functions in the water - vascular system. The structure with the arrow (a small circular structure) is the madreporite as it has the characteristic appearance of this structure.
• Central disc: The central disc is the central part of the starfish from which the arms radiate. The larger central area (encompassing the regions with the anus and madreporite and connecting to the arms) is the central disc as it is the main central body part from which the arms (the textured, arm - like extensions) radiate.

Answer:

• Anus: Matches the top - most circular structure (aboral surface, central - aboral region).
• Madreporite: Matches the small circular structure with the arrow (aboral surface, porous - looking small circle).
• Central disc: Matches the larger central area connecting the arms and containing the anus and madreporite.