Matching Pairs EchinodermsOnline version Los alumnos han de unir la descripción de cada grupo de equinodermos con la imagen by Eva Aguilera 1 They are star-shaped with five arms that are formed from a central disk 2 They have a long, cylindrical body with no arms 3 They are cup-shaped and have five arms that branches into others 4 They are shaped like stars and have five arms 5 They are shaped like a balloon and have articulated spines that they used for their defense