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. 2021 Jul 23;11(8):2191. doi: 10.3390/ani11082191

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Specific male anatomy. Species-specific morphologies in sharks and C. monstrosa with relevance in sperm extraction procedures. The reproductive, excretory, and digestive systems are marked with different colors: the seminal vesicle and ductus deferens in green, the excretory system in yellow, and the access to the digestive system in red. The dotted lines in Centrophorus uyato represent the position of the hepatic lobes. The grey circles are the abdominal pores that connect the pleuroperitoneal cavity with the exterior. (A) Model observed in catsharks, family Scyliorhinidae. (B) Model for blue shark Prionace glauca. (C) Model observed in little gulper shark Centrophorus uyato. (D) Bluntnose sixgill shark Hexanchus griseus. (E) Rabbitfish Chimaera monstrosa.