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The fimbriae (singular fimbria) is a fringe of densely ciliated tissue projections of approximately 1 mm in width around the distal tubal opening, oriented towards the ovary. [12] They are attached to the ends of the infundibulum, extending from its inner circumference, and muscular wall. [12] The cilia beat towards the fallopian tube. [12]
A still more complicated form of epigyne is found in some of the sheet weavers (Linyphiidae) and orb weavers , where the ovipositor consists of two finger-like projections: first, the more common one, the scape, which arises from the atriolum, and consequently in front of the opening of the oviduct; and second, one which arises behind the ...
In amniotes – reptiles, birds, and mammals – the egg is enclosed with an outer layer, or amnion, which has led to further development of the oviduct.In reptiles, birds, and monotremes, the main part of the oviduct is a muscular tube, capable of considerable distension to transport the large eggs that are produced.
The development of the reproductive system is the part of embryonic growth that results in the sex organs and contributes to sexual differentiation.Due to its large overlap with development of the urinary system, the two systems are typically described together as the genitourinary system.
Tail end of human embryo, from eight and a half to nine weeks old. 1 - 7: Homologous male and female pelvic organs. Diagrams that show the development of male and female organs from a common precursor.
After hatching, the embryonic pole of the blastocyst faces the uterine endometrium. Once they make contact the trophoblast begins to rapidly proliferate. The cytotrophoblast secretes proteolytic enzymes to break down the extracellular matrix between the endometrial cells to allow finger-like projections of trophoblast to penetrate through.
An unusual sea slug with a large hood, a tail with fingerlike projections and glowing bioluminescence has been found living off the West Coast of the US.
Male embryogenesis: The developing testes produce AMH causing regression of the paramesonephric ducts.: Disturbances can lead to persistent Müllerian duct syndrome.: The ducts disappear except for the vestigial vagina masculina and the appendix testis.