cellular structure of the Leydig organ in the shark, Etmopterus spinax (L.)

In Etmopterus spinax, a small deep water shark, the predominating lymphomyeloid tissue is the so called Leydig organ. This consists of bone marrow-like tissue situated between the muscularis and the mucosa of the esophagus. Examination by light and electron microscopy shows that the Leydig organ pro...

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