The multi-segmented sensory apparatus of the head of arthropods, called the tentacles. They are transformed by appendages. Crustaceans have 2 pairs of large and small tentacles; insects have only 1 pair. Tentacles of various shapes, such as insect tentacles have filamentous, rod-shaped, rosary-shaped, serrated, pectinate and feather-like, etc.; each tentacle is divided into stalk and whip two parts, tentacle stalk 2 ~ 3 sections, tentacle whip slender, the number of sections is very large. Tentacles in addition to touch, smell, there are other functions, such as water flea tentacles can be used to swim.

Which parts of common seafood can not eat

Crab

Where can not eat

Crab there are three things can not eat!

Crab gills: inside the crab shell, shaped like teeth, soft;

Crab intestines: inside the crab excreta, after breaking open the crab body, see the crab yolk, crab meat at the crab there is a root of black things connected to the crab stomach, to be removed;

Crab stomach: hiding in the crab yolk in the triangular packet, but also have crab excreta. It is hidden in the heap of crab yolk on the crab lid and is discarded after the yolk is eaten.

Sea snails

Where not to eat

Old Dalian people do not eat conch brain, said the fear of seasickness. Some people do not eat bitter gall, in fact, that eat off the fire.