ambulacral造句

• The five ambulacral grooves contain numerous ambulacral spines and tube feet.
• The five ambulacral grooves contain numerous ambulacral spines and tube feet.
• Each of these have simple ambulacral pore.
• In some forms the single ray ( brachiole or aulacophore ) possessed an ambulacral groove.
• The ambulacral grooves extend onto the arms, which thus have tube feet along their inner surfaces.
• There is often a large row of marginal plates adjoining the ambulacral groove, sometimes bearing spines.
• However they are differentiated by the lack of accessory ambulacral pores, which are characteristic of that group.
• Five or more radial canals extend from the ring canal, one in each arm above the ambulacral groove.
• The radial canal ends in a small water-filled tentacle which protrudes through the uppermost plate of the ambulacral region.
• They are essentially fused plates which correspond to the parallel ambulacral plates in sea stars and five Paleozoic families of ophiuroids.
• Other species protect their vulnerable tube feet and arm tips by lining their ambulacral grooves with spines and heavily plating their extremities.
• Ophiuroids have no ambulacral groove, and the radial canals instead run through the solid bone-like ossicles of the arms.
• Five, or less commonly three, ambulacral areas ran along the outside of the body, radiating outwards from the mouth.
• One of several different species of symbiotically within the ambulacral grooves on the oral ( under ) surface of the slime star.
• Most fossil forms had multiple columns of ambulacral plates, rather than the two rows found in all living species of sea urchin.
• A number of small tentacles either surrounded the mouth, or projected outwards in a row from the ambulacral areas, depending on species.
• They are arranged into interambulacral and ambulacral regions and the arms have an ambulacral groove on the underside from which the tube feet project.
• They are arranged into interambulacral and ambulacral regions and the arms have an ambulacral groove on the underside from which the tube feet project.
• In some species, the ambulacral areas can no longer be distinguished, with tube feet spread over a much wider area of the body.
• The radial canals run through notches in the calcareous plates surrounding the mouth and then run along the ambulacral areas along the length of the body.