SOME ANATOMICAL DIFFERENCES OF POSSIBLE TAXONOMIC VALUE IN THE FEMALE REPRODUCTIVE ORGANS OF SITOPHILUS (CURCULIONIDAE: COLEOPTERA)

1968 ◽  
Vol 100 (11) ◽  
pp. 1226-1228 ◽  
Author(s):  
N. R. Khan ◽  
A. J. Musgrave
Keyword(s):  
Reproductive Organs ◽  
Similar Species ◽  
Spermathecal Duct ◽  
Female Reproductive Organs

AbstractThe length of the spermathecal duct differs in species of Sitophilus. It is suggested that this criterion may be of value as an additional means of separating the two very similar species S. oryzae and S. zea-mais.

Ultrastructural aspects of gymnosperms reproductive organs tissues due to their functional condition

1978 ◽  
Vol 36 (2) ◽  
pp. 440-441
Author(s):  
G. M. Kozubov
Keyword(s):  
Metabolic Activity ◽  
Functional Condition ◽  
Reproductive Organs ◽  
Considerable Change ◽  
Complicated Structure ◽  
Tetrad Stage ◽  
Ubisch Bodies ◽  
Similar Organization ◽  
Female Reproductive Organs ◽  
High Metabolic Activity

The ultrastructure of reproductive organs of pine, spruce, larch and ginkgo was investigated. It was found that the male reproductive organs possess similar organization. The most considerable change in the ultrastructure of the microsporocytes occur in meiosis. Sporoderm is being laid at the late tetrad stage. The cells of the male gameto-phyte are distinguished according to the metabolic activity of the or- ganells. They are most weakly developed in the spermiogenic cell. Ta-petum of the gymnosperms is of the periplasmodic - secretorial type. The Ubisch bodies which possess similar structure in the types investigated but are specific in details in different species are produced in tapetum.Parietal and subepidermal layers are distinguished for their high metabolic activity and are capable of the autonomous photosynthesis. Female reproductive organs differ more greatly in their struture and have the most complicated structure in primitive groups. On the first stages of their formation the inner cells of nucellus are transformed into the nucellar tapetum in which the structures similar to the Ubisch bodies taking part in the formation of the sporoderm of female gametophyte have been found.

Medical Metaphors of Women's Bodies: Menstruation and Menopause

1988 ◽  
Vol 18 (2) ◽  
pp. 237-254 ◽  
Author(s):  
Emily Martin
Keyword(s):  
19Th Century ◽  
Reproductive Organs ◽  
Central Control ◽  
Centralized Control ◽  
Medical Texts ◽  
Women's Bodies ◽  
Waste Products ◽  
Bureaucratic Organization ◽  
Medical Metaphors ◽  
Female Reproductive Organs

Implicit, underlying imagery in medical descriptions of menstruation and menopause is exposed, beginning with 19th century views. Contemporary medical texts and teaching reveal two fundamental assumptions about women's bodies. First, they assume that female reproductive organs are organized as if they form a hierarchical, bureaucratic organization under centralized control. Given this assumption, menopause comes to be described negatively, as a process involving breakdown of central control. Second, they assume that women's bodies are predominantly for the purpose of production of desirable substances, primarily babies. Given this assumption, menstruation comes to be seen negatively, as a process involving failed production, waste products, and debris. Alternative imagery that works from our current understanding of physiology, but avoids denigration of women's bodies, is suggested.

Effects of Growth Hormone on Female Reproductive Organs

2001 ◽  
Vol 30 (5) ◽  
pp. 265-271 ◽  
Author(s):  
G. G. Kaiser ◽  
F. Sinowatz ◽  
G. A. Palma
Keyword(s):  
Growth Hormone ◽  
Reproductive Organs ◽  
Female Reproductive Organs

Ultrastructure of the female reproductive organs (ovary, vitellaria, and Mehlis' gland) of Halipegus eccentricus (Trematoda: Derogenidae)

1986 ◽  
Vol 64 (10) ◽  
pp. 2203-2212 ◽  
Author(s):  
Jon M. Holy ◽  
Darwin D. Wittrock
Keyword(s):  
Cell Types ◽  
Reproductive Organs ◽  
Golgi Body ◽  
Digenetic Trematode ◽  
Secretory Cells ◽  
Cortical Granules ◽  
Golgi Bodies ◽  
Transmission Electron ◽  
Vitelline Cells ◽  
Female Reproductive Organs

The female reproductive organs (ovary, vitellaria, and Mehlis' gland) of the digenetic trematode Halipegus eccentricus were studied by transmission electron microscopy. Oocytes entered diplotene while in the ovary and produced cortical granules and lipid bodies. Vitelline cells produced large amounts of eggshell protein but no yolk bodies. Two types of Mehlis' gland secretory cells were present, distinguishable by the morphology of their rough endoplasmic reticulum, Golgi bodies, and secretory bodies, and by the persistence of recognizable secretory material within the ootype lumen after exocytosis. In an attempt to standardize the nomenclature regarding the cell types of the Mehlis' gland, a classification that takes into account these four criteria is proposed. Two basic types of Golgi body organization were noted for the cells of the female reproductive system: a stack of flattened cisternae (Mehlis' gland alpha cells) and spherical Golgi bodies with vesicular cisternae (oocytes, vitelline cells, and Mehlis' gland beta cells).

Tumors of Female Reproductive Organs

1994 ◽  
pp. 827-833
Author(s):  
Kathi D. Clement ◽  
Pamela D. Connor ◽  
Kristina J. Hartman
Keyword(s):  
Reproductive Organs ◽  
Female Reproductive Organs

Transplacental administration of diethylstilbestrol (DES) causes lesions in female reproductive organs of Donryu rats, including endometrial neoplasia

1999 ◽  
Vol 141 (1-2) ◽  
pp. 219-228 ◽  
Author(s):  
Tsuyoshi Kitamura ◽  
Susumu Nishimura ◽  
Kenji Sasahara ◽  
Midori Yoshida ◽  
Jin Ando ◽  
...  
Keyword(s):  
Reproductive Organs ◽  
Donryu Rats ◽  
Female Reproductive Organs

Unopposed Endogenous Estrogens and the Incidence of Cancer in Female Reproductive Organs

1981 ◽  
Vol 60 (s101) ◽  
pp. 17-20 ◽  
Author(s):  
Elof D. B. Johansson ◽  
Ioannis E. Messinis ◽  
Sven Johan Nillius
Keyword(s):  
Reproductive Organs ◽  
Incidence Of Cancer ◽  
Female Reproductive Organs
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