Tentacles — Tentacles are found in Cnidarians. These finger-like projections surrounding the mouth, called tentacles help in catching food and swimming.
Nephridia — Nephridia are found in Annelids. Nephridia are special organs for excretion.
Gills — Gills are found in Class Pisces. Gills help fishes breathe.
Muscular foot — Muscular foot is found in Molluscs. Mulluscs move with the help of a muscular foot.
Mammary glands — Mammary glands are found in mammals (females). Young ones suckle milk from mammary glands present in mothers.