water vascular system การใช้

• They are part of the water vascular system.
• The water vascular system, haemal system and perihaemal system form the tubular coelomic system.
• The structure of the water vascular system contains several calcareous parts before moving to the podia.
• Some of the body cavities degenerate but others become the water vascular system and the visceral coelom.
• Like other echinoderms, basket stars lack blood and achieve gas exchange via their water vascular system.
• Like other echinoderms, crinoids possess a water vascular system that maintains hydraulic pressure in the tube feet.
• Once the tube feet develop from the water vascular system, the larva frees itself from the bottom.
• However, no stereom or internal structure showing a water vascular system is present and the identification is inconclusive.
• The movement of the tube foot depends on the hydraulic pressure of the water vascular system, and individual muscle action.
• This is a skeletal plate, or sieve, opening to the water vascular system, located on the aboral surface.
• The color of the madreporite is light orange, and it has raised pores that connect to the water vascular system.
• Indeed, the blood itself is essentially identical with the coelomic fluid that bathes the organs directly, and also fills the water vascular system.
• The water vascular system of the sea star consists of a series of seawater-filled ducts that function in locomotion and feeding and respiration.
• Although the contents of the water vascular system are essentially sea water, apart from coelomocytes, the fluid also contains some protein and high levels of potassium salts.
• The water vascular system serves to transport oxygen from, and carbon dioxide to, the tube feet and also nutrients from the gut to the muscles involved in locomotion.
• A central haemal ring surrounds the pharynx next to the ring canal of the water vascular system, and sends off additional vessels along the radial canals beneath the ambulacral areas.
• Although they possess tentacles around the mouth derived from the water vascular system, they have no true tube feet, and are therefore believed to be related to the Apodida.
• The coelom, or body cavity is divided into three chambers in the larva, two of which form the water vascular system, while the other remains as the adult body cavity.
• All these groups tend to be radially symmetric and have a water vascular system that operates by hydrostatic pressure, enabling them to move around by use of many suckers known as tube feet.
• All these groups tend to have radial symmetry and have a water vascular system that operates by hydrostatic pressure, enabling them to move around by use of many suckers known as tube feet.