WebAug 19, 2024 · Physiological Processes of Echinoderms. Echinoderms have a unique system for gas exchange, nutrient circulation, and locomotion called the water vascular … WebSkin and mantle. 2. Molluscan gills or ctenidia or branchiae and. 3. Lungs or pulmonary sac. The outer covering of the body (skin) and mantle usually act as accessory respiratory organs. 1. Skin and Mantle — as Respiratory Organs: Skin appears to be the simplest type of respiratory structure encountered in Molluscs.
Arthropods And Echinoderms Section Review Answer Key
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Echinodermata - The Circulatory System
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