A hemopoietic organ found in elasmobranchs. Along with the spleen and special tissue around the gonads, this structure produces red blood cells and it is nestled along the top and bottom of the esophagus. [ http://www.elasmo-research.org/education/topics/p_blood_cells.htm http://en.wikipedia.org/wiki/Leydig's_organ ]
Term information
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Phenotype notes: Leydig's organ can be quite large - a 1.6-kilogram (3.5-pound) one was reported from a 1.8-metre (6-foot) long Bluntnose Sixgill Shark (Hexanchus griseus). Structure notes: divided into dorsal and ventral patches, gradation varies between species. Lacks erythroblasts and fat cells[Honma 1983]
Term relations
- hemopoietic organ
- thoracic cavity element
- immune organ
- composed primarily of some leukocyte
- part of some immune system
- located in some wall of esophagus
- in taxon some (not Holocephali)
- part of some hematopoietic system
- in taxon some Elasmobranchii