In holothuroids, the podia may be reduced or absent and the madreporite opens into the body cavity so that the circulating liquid is coelomic fluid rather than sea water.
Ophiuroid podia generally function as sensory organs.
The ampullae are connected to suckerlike podia.
Ampulla contain both circular muscles and longitudinal muscle, whereas the podia contain the latter only.
Tube feet consist of two parts: ampulla and podia.
The organization of the system is somewhat different in ophiuroids where the medreporite may be on the oral surface and the podia lack suckers.
Before this happened, the podia probably had a feeding function as they do in the crinoids today.
She started playing in 1987 at the age of 4, and subsequently appeared on various television shows and concert podia until 1998.
