oral disk meaning in Hindi

Examples

1. In lampreys, the mouth is formed into an oral disk.
2. Oral disk is terminal with expanded and upward-directed lips.
3. In larger specimens, the oral disk becomes densely curved and frilly.
4. The apical end is the oral disk which functions as one or more mouths.
5. The oral disk is plain red and the tapering tentacles are red and have no transverse striations.
6. It has a broad, flat oral disk surface and no striping, banding, or other markings.
7. Their oral disks also contain vibrissae which have been classified as bristle-like hairs that are used in nongrasping investigation of objects and food.
8. It is differentiated from " Anthopleura xanthogrammica " by the coloration of the tentacle tips, striped oral disk, and vertical rows of verrucae.
9. It can be distinguished by its bright red oral disk colour, having about 32 40 tentacles, and having only basitrichs and mastigophores present in its pharynx.
10. The oral disk varies in colouration, and is sometimes red, green, black or white, and may have streaks of darker colour radiating outward from its mouth.