ⓘ Water vascular system

                                     

ⓘ Water vascular system

The water vascular system is a hydraulic system used by echinoderms, such as sea stars and sea urchins, for locomotion, food and waste transportation, and respiration. The system is composed of canals connecting numerous tube feet. Echinoderms move by alternately contracting muscles that force water into the tube feet, causing them to extend and push against the ground, then relaxing to allow the feet to retract.

The exact structure of the system varies slightly, five classes of echinoderms. This system is part of the coelomic cavity of echinoderms, together with the extant haemal or haemal system, perivisceral extant gonadal and perihaemal extant.

Other terms sometimes used to refer to the vascular system of water supply "system ambulacral" and "aquifer system". In the past, "aquifer system" is also used to refer to many unrelated invertebrates structure, but today it is limited to water channels in sponges and hydrostatic skeleton of some mollusks, as Polinices.

                                     
  • tissue system of that plant. The cells in vascular tissue are typically long and slender. Since the xylem and phloem function in the conduction of water minerals
  • Vascular plants from Latin vasculum: duct also known as tracheophytes from the equivalent Greek term trachea form a large group of plants c. 308
  • transport water minerals or food through the plant. Other names for the vascular cambium are the main cambium, wood cambium, or bifacial cambium. Vascular cambia
  • Non - vascular plants are plants without a vascular system consisting of xylem and phloem. Although non - vascular plants lack these particular tissues, many
  • The circulatory system also called the cardiovascular system or the vascular system is an organ system that permits blood to circulate and transport
  • Vascular resistance is the resistance that must be overcome to push blood through the circulatory system and create flow. The resistance offered by the
  • ˌmædrɪˈpɔːraɪt is a lightcolored calcareous opening used to filter water into the water vascular system of echinoderms. It acts like a pressure - equalizing valve
  • The water vascular system is a series of canals through which fluid moves to help propel the podia of the sea urchin. The fluid that fills the water vascular
  • form the water vascular system while the other remains as the adult body cavity. Once the tube feet develop from the water vascular system the larva
  • which carry blood from the capillaries back towards the heart. The word vascular meaning relating to the blood vessels, is derived from the Latin vas