Thus, pit membranes function as safety valves in the plant water transport system. Averaged across a ... Zwieniecki, M. A. Vascular Transport in Plants. San Diego, CA: Elsevier Academic Press ...

In addition to the digestive system, the interior of the test also houses the gonads (go) and the water vascular system (rwv). In regular echinoids there are five gonads, each connected to the ...

This exercise illustrates the two major features that all members of the Phylum Echinodermata have in common - the water vascular system and pentaradial symmetry. The take home message is that all ...