منابع مشابه
Phallus development in the turtle Trachemys scripta.
Development of a phallus occurs in almost all amniotes; however, considerable variation in phallus morphology among different amniote lineages has contributed to the debate about their structural homology. Mammals are the only amniotes that form a closed urethral tube within the penis. In contrast, the phallus of reptiles and birds has an open urethral groove, or sulcus spermaticus, that facili...
متن کاملMeiotic Spindle: Sculpted by Severing
Katanin is a conserved AAA ATPase with the ability to sever microtubules, but its biological function in animal cells has been obscure. A recent study using electron tomography has found that katanin stimulates the production of microtubules in the meiotic spindles of Caenorhabditis elegans oocytes.
متن کاملDevelopmental Basis of Phallus Reduction during Bird Evolution
BACKGROUND One of the most puzzling events in evolution is the reduction and loss of the phallus in birds. All birds reproduce by internal fertilization, but only ∼3% of birds have retained a phallus capable of intromission. A number of hypotheses have been proposed for the evolutionary mechanisms that drove phallus reduction; however, the underlying developmental mechanisms are unknown. RESU...
متن کاملPhalloplasty for an amputated phallus in intersex patients
OBJECTIVE To report our experience of phalloplasty using a radial forearm free-flap (RFF) and insertion of a penile prosthesis for the amputated phallus. PATIENTS AND METHODS Phalloplasty was carried out in nine intersex patients with ambiguous genitalia as a result of female circumcision, with a consequent partial or complete excision of their microphallus. Six months later a penile prosthes...
متن کاملSignification of the Phallus ” ( 1958 ) According to Lacan
signifier of difference whose function—and this is crucial—is to give a per-
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ژورنال
عنوان ژورنال: Left History: An Interdisciplinary Journal of Historical Inquiry and Debate
سال: 2019
ISSN: 1913-9632,1192-1927
DOI: 10.25071/1913-9632.39376