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Finalmente, se exponen las diferentes modalidades que conllevan al desarrollo de los embriones y se pormenoriza la estructura uterina. Hydrobiologia Amer Zool Uterine dynamics of the southern eagle ray Myliobatis goodei Chondrichthyes: Myliobatidae from the southwest Atlantic ocean. Ital J Zool: Braz J Biol Friedman MHF The function of the claspers and claspers glandes in the skate. J Biol Board Canada 1: Microscopic study and phylogenetic reproductive implications.

Int J Morphol Reproduction and embryonic development of the sand tiger shark Odontaspis taurus Rafinesque. Fish Bull Guallart J, Vicent JJ Changes in composition during embryo development of the gulper shark, Centrophorus granulosus Elasmobranchii, Centrophoridae : an assessment of maternal-embryonic nutritional relationships.

Environ Biol Fish Anat Rec J Exp Zool Theriogenology Mar Freshwater Res Biol Rev Leigh Sharpe WH The comparative morphology of the secondary sexual characters of Holocephali and elasmobranch fishes. The claspers, clasper siphons, and clasper glands. Biodivers Conserv McMillan D Fish Histology. Female Reproductive System. Springer, The Netherlands, pp.

Ann NY Acad Sci — Piercy A, Gelsleichter J, Snelson FF Morphological changes in the clasper gland of the Atlantic stingray Dasyatis albina associated with the seasonal reproductive cycle. J Morphol Pratt H L Elasmobranch gonad structure: a description and survey. Copeia Mole Reprod Develop Ranzi S Le base fisio-morphologiche dello sviluppo embrionale dei Selaci. Parte I. Napoli — J Fish Biol Gametogenesis and Microscopic Validation of Maturity Criteria. Wourms JP The maternal-fetal relationship in fishes.

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Sharks have been around since the dinosaurs, and haven't really changed too much. Sharks are a type of fish that have a skeleton made up of cartilage. Cartilage is a tough, connective tissue. It isn't as tough as bone, but it isn't as flexible as muscle either. Humans have cartilage present in their ears and the tip of their noses. Sharks also lack a swim bladder, unlike other bony fish.


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