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  • Title: The epididymis and its development in ratite birds (ostrich, emu, rhea).
    Author: Budras KD, Meier U.
    Journal: Anat Embryol (Berl); 1981; 162(3):281-99. PubMed ID: 7270904.
    Abstract:
    The epididymis of ratitae is subdivided into a main part and a appendix epididymidis. The appendix epididymidis consists of the ductus aberrans and ductuli aberrantes. The ductus aberrans is the cranial continuation of the ductus epididymidis. The appendix epididymidis is cranially attached to the adrenal gland. In the main part of the epididymis the largest part of the rete testis is found. The rete testis is composed of an intratesticular rete (also named tubuli recti), and intracapsular rete (with a longitudinal cistern and a true rete), and an extratesticular rete (predominantly consisting of approximately 20 longitudinal channels). The rete testis develops most likely embryonally from buds of the glomerular capsules of the mesonephros. The ductuli efferentes proximales also from these capsules, while the ductuli efferentes distales develop from the proximal and distal tubules and intermediate-segments of the mesonephros. The ductus epididymidis originates from the Wolffian duct and meanders dorsolaterally through the epididymis.
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