Therefore, we propose reproductive schemes that describe the importance of the different mating behavior until vital reproductive mechanisms lead to the success of their internal or external sexual reproduction. In particular, this review aims to integrate and describe each participating organ’s physiological, histological, and morphological functions in reproduction. Principally, reproduction varies in some frog species, from mating to internal or external fertilization. Therefore, it is essential to describe all known reproductive mechanisms. In contrast, others have implemented unusual mechanisms for embryo development, such as the utilization of structures such as the stomach, dorsal sac, or vocal sac as a gestational organ. Some species give birth to developed frogs, while others give birth to larval frogs. įollowing fertilization, embryo development and maintenance vary among species. Finally, the ovisac or uterus stores the oocytes for subsequent fertilization by the spermatozoa. These regions participate in the oocyte’s capture, secretion, and fertilization during its transport to the ovisac. The oviduct consists of three regions: infundibulum, ampulla, and isthmus. The oviduct is a tubular organ connected to the ovaries. The reproductive process begins in the ovaries with the formation of oogonia and oocytes. The ovaries’ fat bodies contribute to the formation of follicles, oocytes, hormones, and yolk. Meanwhile, the female frog’s reproductive system comprises oviducts and ovaries attached to fat bodies. In fact, spermatozoa morphology varies among frog species. The testicles consist of a seminiferous tubule network that produces spermatozoa. Fat bodies play an essential role in producing reproductive hormones. The main components of the male reproductive system are the testicles and seminiferous tubules, which are associated with fat bodies. There are also significant differences in the levels of development attended by the parents, ranging from larval to juvenile frogs. In this publication, we speak of internal fertilization that involves a diversity of incubation structures that can be dedicated or temporary. Amphibians have two sexual reproductive types: internal and external. The peritoneal funnels on the ventral face of the kidneys.Different animal groups developed divergent reproductive mechanisms. Than that of the female and the absence of coelomic cilia except in The tympanum and the forearm a more slender and streamlined body Season approaches a distinct low, guttural croaking sound with theĪccompanying swelling by air of the lateral vocal sacs located between Pad which changes thickness and color intensity as the breeding
The identifyingįeatures which distinguish it from the female are a darkened thumb The mature male frog is generally smaller than the female, rangingįrom 60 to 110 mm. The end result is the haploid gamete, in either instance. In many forms the first division is reductional and the second is equational. The oocyte and spermatozoa maturation process. Historic Disclaimer - information about historic embryology pages (1951) The Blakiston Company.įrog Development (1951): 1 Introduction | 2 Rana pipiens | 3 Reproductive System | 4 Fertilization | 5 Cleavage | 6 Blastulation | 7 Gastrulation | 8 Neurulation | 9 Early Embryo Changes | 10 Later Embryo or Larva | 11 Ectodermal Derivatives | 12 Endodermal Derivatives | 13 Mesodermal Derivatives | 14 Summary of Organ Appearance | 15 Glossary | 16 Bibliography | Figures Book - The Frog Its Reproduction and Development. ייִדיש | Tiếng Việt These external translations are automated and may not be accurate. Google Translate - select your language from the list shown below (this will open a new external page)
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