Study the anatomy of a starfish here with printable starfish diagrams to use as references. These marine invertebrates typically have a central disc and five arms, though some species have a larger number of arms with many species are brightly colored in various shades of red or orange, while others are blue, grey or brown. You can observe in the following diagram about the detailed anatomy of starfish.
Starfish have tube feet operated by a hydraulic system and a mouth at the center of the oral or lower surface. Observe in the starfish diagram below, that they have two surfaces. The spiny upper surface is called the aboral or dorsal surface. The body cavity also contains the water vascular system that operates the tube feet, and the circulatory system, also called the hemal system.
A portion of the body cavity called the axial sinus connects the three rings. Each ray also has hemal channels running next to the gonads. The oral surface of the sea star is next, which is the sea star’s underside that’s closest to its mouth. The anatomy visible from both of these surfaces has been identified and defined. The starfish vascular system is extremely important because it uses it to move, eat, breath, and cling to things.
This diagram collection provides representative echinoderm, the starfish. The anatomy of this animal is typical of the rest of the group. One coloring page of starfish as a bonus is given above. Save and print these diagrams to aid your study about the species, along with the labels and explanation!