Found on the ventral side abdomen, they number from one to four pairs and h
Found on the ventral side abdomen, they number from one to four pairs and house minute tubes which open onto spigot structures.  A mixture of proteins, including fibroin, harden in these organs and are released as solid strands which can be used for, among other things, wrapping prey and making egg cases.  For 10 points, name these arachnid organs which conduct and hold silk.
Found on the ventral side abdomen, they number from one to four pairs and house minute tubes which open onto spigot structures.  
spinnerets