Results 131 to 140 of about 1,103 (168)

Studies on the ovotestis of the slug Agriolimax reticulatus (M�ller)

Cell and Tissue Research, 1977
The follicle cells, nurse cells and germinal epithelia, which are closely associated with the oocyte of Agriolimax reticulatus (Müller) during its development in the ovotestis, have been studied using light and electron microscopy. The various secretory, digestive and phagocytic activities of these cells have also been investigated using electron ...
R S, Hill, I D, Bowen
openaire   +4 more sources

Egg-laying hormone: Direct action on the ovotestis of Aplysia

General and Comparative Endocrinology, 1983
The bag cells are a group of neuroendocrine cells located in the abdominal ganglion of Aplysia californica. These cells induce egg laying in the animal through the release of neurohormone(s). Previous experiments established that an extract of bag cells releases eggs from isolated ovotestis fragments in a dose-dependent manner. (F. E. Dudek and S.
B S, Rothman, G, Weir, F E, Dudek
openaire   +2 more sources

[True hermaphroditism with bilateral ovotestis].

Ginecologia y obstetricia de Mexico, 1998
A nineteen years old woman with ambiguous external genitalia was studied. This condition had been previously identified as a newborn, but her parents refused medical attention and it was reared as a girl. At 12-years, she began spontaneous mammary development, appearing pubic and axillary hair, and clitoral enlargement.
A, Güitrón, G, Forsbach, J M, González, J G, Garza, J, Vázquez, G, Espinoza   +5 more
openaire   +1 more source

Female gonad of moles, genusTalpa (Insectivora, Mammalia): Ovary or ovotestis?

Journal of Experimental Zoology, 2000
The female gonads of moles (genus Talpa) are composed of a cortex, functioning as an ovary, and a medulla, which is structurally similar to that of the testis. In the female reproductive apparatus there are masculine glandular annexes, such as a bilobate prostate, two Cowper glands, and a penis-like clitoris. All these features have recently led to the
F. Beolchini, REBECCHI, Lorena, E. Capanna, BERTOLANI, Roberto   +3 more
openaire   +3 more sources

Germinal and non-germinal lines in the ovotestis of Helix aspersa: a survey

Roux's Archives of Developmental Biology, 1987
The study of gonadal organogenesis and differentiation by means of light and electron microscopy suggested the following in Helix aspersa: (1) the distal parts of the acini have components of mesodermal origin, whereas the neck and efferent duct comprise ectodermal elements; (2) a segregation of a germinal line occurs early, during the embryonic life; (
Bernadette, Griffond, Jacqueline, Bride
openaire   +2 more sources

Ultrastructure of an ovotestis in a case of true hermaphroditism.

Obstetrics and gynecology, 1976
A case of true hermaphroditism with bilateral ovotestes is reported. The karyotype was 46, XX. At laparotomy done at the age of 21 months a uterus, bilateral fallopian tubes, and bilateral gonads were observed. On frozen section examination, each gonad was shown to be an ovotestis.
L M, Roth, R E, Cleary, W L, Hokum
openaire   +1 more source

Report of an ovotestis with carcinoma of the cervix.

Journal of the Medical Association of Thailand = Chotmaihet thangphaet, 1994
A case of true hermaphrodite with left unilated ovotestis was reported in a 37-year-old Thai male. Bilateral gynaecomastia, under and maldevelopment of external genitalia were present with infertility. Chromosome study was not available. Pathological examination of resected specimens showed evidence of ovarian and testicular tissue. Stratified squamous
openaire   +1 more source

Observations on cells of the ovotestis of a pulmonate snail

1960
The numerous cytological problems in spermatogenesis and yolk formation have been studied intensively by light microscopists, but it is only recently that electron microscopy has been utilized in an effort to understand the profound nuclear and cytoplasmic changes which take place. The cells of the ovotestis of pulmonate snails offer excellent material
openaire   +1 more source

An analysis of a human ovotestis

American Journal of Obstetrics and Gynecology, 1938
James R. Reinberger, Cleveland S. Simkins   +1 more
openaire   +1 more source

PERSISTENT BEHAVIOURAL OESTRUS IN A RAT WITH AN OVOTESTIS

Journal of Endocrinology, 1970
H H, Feder, R M, Brenner
openaire   +2 more sources