What Are The Three Important Parts Of Echinoderm?
What Are The Three Important Parts Of Echinoderm? The axial organ, a complex and elongated mass of tissue found in all echinoderms except holothurians, represents the common junction of the perivisceral coelom, the water-vascular system, and the hemal system. What 3 things generally characterize echinoderms? Although all living echinoderms have a pentamerous (five-part) radial symmetry,