The rapidly proliferating mass of cells at the caudal extremity of the embryo; remnant of the primitive node. [ BTO:0001445 ]
术语信息
- BTO:0001445
- EMAPA:16580
- EHDAA:1595
- TAO:0000077
- EFO:0002748
- AAO:0011104
- VHOG:0000201
- MAT:0000070
- MIAA:0000070
- ZFA:0000077
- EHDAA2:0001976
- XAO:0000107
uberon_slim, efo_slim, pheno_slim, vertebrate_core
Rapidly proliferating mass of cells at the caudal extremity of the embryo. Its formation is reflected in a caudal carving of the posterior portion of the archenteric canal at NF stage 22. With its further outgrowth, the postanal gut primordium becomes stretched. Its lumen is in broad communication with the hindgut at NF stage 25.[AAO]
(...) at some stage of its development, every chordate exhibits five uniquely derived characters or synapomorphies of the group: (...) (5) a larva or embryo with a postanal tail.[well established][VHOG]
The rapidly proliferating mass of cells at the caudal extremity of the embryo; remnant of the primitive node.