synonym Genital zone General girdle
This entry is missing Overview , add relevant content to make the entry more complete, and it can also be upgraded quickly. Hurry up edit Come on! The annular belt is an annular belt structure, and an upright section of water pipe is an annular belt structure.
In biology, the girdle is the reproductive zone of some annelids, which is located in a certain position of the body and has no Internode sulcus 、 Seta , shaped like a ring. During reproduction, glandular cells on the girdle Secretory protein And mucus to form a protein ring outside the ring band. The protein ring with 1~3 fertilized eggs falls off from the earthworm and forms a cocoon. The fertilized egg develops into a small earthworm in the egg cocoon. - Chinese name
- Annular band
- Correspondence
- Genital zone
- Object
- invertebrate
- Features
- Multigland
Ring (1) invertebrate, annelida Pheretima At sexual maturity, the epidermis at the 14th to 16th segments is thickened and multi glandular, which is easily distinguished from other segments. Also called Genital zone ； The girdle of leeches is on 10-13 nodes. (2) A series of thick walled special cells on the sporangium of ferns (such as ferns), also known as zona. Sporangium At maturity, the girdle shrinks due to drying, which can cause the sporangium to crack and release spores. Mosses (e.g Calabash moss ）Of Capsule The ring of sclerenchyma cells between the base of capsule cap and capsule teeth is also called ring band. When the capsule is mature, the ring band cracks, capsule cap falls off, capsule teeth extend, and spores pop out. 
Annular band 
