Histological changes in the vaginal mucosa of the sow in relation to the oestrous cycle

The mares chosen for the investigation of the changes in the reproductive organs during the oestrous cycle were kept under observation for some time before they were killed. The duration of the heat period in these animals was 7 days and the length of the dioestrus was 16 days. Ovulation takes place at about a day before the end of oestrus. The size of the ovary during the oestrous cycle is chiefly influenced by the growing Graafian follicle. The number of follicles present at different stages varies greatly. The numerous small follicles present at the beginning of oestrus disappear later in the cycle; it is suggested that this may be due to the lack of follicle-stimulating hormone. The colour of the corpus luteum varies greatly at different stages of the cycle. The rupture of the follicle is associated with some bleeding. The active stage of the corpus luteum is very short, and the maximum diameter of the corpus luteum seems to be always below that of the Graafian follicle. The greater development of the Graafian follicle, with its secretion of oestrin, in the mare leads to its playing a more important role than in the cow and the sow, in which species the corpus luteum takes a m ore dominant part in the cycle. It appears that the much longer oestrus in the mare than in the cow is due to the longer time required by the follicle to come to the surface and to break through. This is probably due to the peculiar structure of the ovary in the mare, since the ovulation, which is spontaneous, can only occur in the small ovulation fossa. No pronounced secretion stage occurs during oestrus in the Fallopian tubes.

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Activity of Enzymes in the Mucosal Tissues and Rinsings of the Reproductive Tract of the Naturally Cyclic Ewe

Australian Journal of Biological Sciences ◽

10.1071/bi9780345 ◽

1978 ◽

Vol 31 (4) ◽

pp. 345 ◽

Cited By ~ 6

Author(s):

BE Murdoch ◽

T O'Shea

Keyword(s):

Reproductive Tract ◽

Oestrous Cycle ◽

Vaginal Mucosa ◽

Mucosal Tissues ◽

Activity Of Enzymes ◽

Cervical Mucosa

The activity of several enzymes has been measured in the oviducal mucosa, endometrium, caruncles, cervical mucosa and vaginal mucosa as well as in uterine, cervical and oviducal rinsings of ewes at days 0 (oestrus), 1, 8 and 15 of the oestrous cycle.

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Changes in the ovary of the mouse following exposure to X-rays. Part I.—Irradiation at three weeks old

Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character ◽

10.1098/rspb.1927.0004 ◽

1927 ◽

Vol 101 (706) ◽

pp. 29-56 ◽

Cited By ~ 35

Keyword(s):

Point Of View ◽

Oestrous Cycle ◽

Follicular Epithelium ◽

Considerable Importance ◽

Corpora Lutea ◽

X Rays ◽

Histological Changes ◽

Post Irradiation ◽

Theca Interna

In a recent paper (Parkes, 8) the effect on the œstrous cycle of destruction of the Graafian follicles at three weeks old by X-rays was described, and the conclusion was reached that the absence of follicles does not inhibit the appearance of the œstrous cycle when the female subsequently becomes mature. In this earlier paper, however, the histological effects in the ovary after exposure to X-rays were only dealt with very briefly, and it is the object of this present paper to consider in detail the histological changes following irradiation at weaning time. The histological effects of irradiation at birth and of irradiation of the adult, together with the effects on the oestrous cycle, will be dealt with in subsequent communications. Two main problems are presented by the histology of these irradiated ovaries. In the first place, the exact fate of the disintegrating follicle is of considerable importance. The maturation of follicles has long been considered to be essential for the appearance of oestrus, and evidence has recently been adduced to show that the hormone responsible for oestrus is elaborated by the follicle. Various elements of the follicle have been held to be responsible by various authors. Allen and Doisv (1), for instance, suggest the follicular epithelium, while Zondek and Aschheim (16) maintain that the theca interna is concerned. Since, therefore, the irradiated ovaries are capable of elaborating oestrin it is essential to know whether the disappearance of follicular tissue is complete or only partial. As reported previously, it is possible to say with certainty that ovum and follicular epithelium disappearentirely, except where the latter helps to form corpora lutea atretica, but the fate of the theca interna is less obvious. This latter question is, however, of importance from a physiological point of view. The second main problem connected with these ovaries is the nature of the cords of the second post-irradiation proliferation which ultimately arise in most of the ovaries after irradiation, and which were tentatively suggested in the earlier paper to be of spermatic character.

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Electron microscope study of the microgranules in human vaginal epithelium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100083710 ◽

1978 ◽

Vol 36 (2) ◽

pp. 568-569

Author(s):

A. Campos ◽

J. Vilches ◽

J. Gomez

Keyword(s):

Electron Microscope ◽

Microscope Study ◽

Intercellular Space ◽

Electron Microscope Study ◽

Vaginal Epithelium ◽

Vaginal Mucosa ◽

Secretory Phase ◽

Cervical Epithelium ◽

Keratinized Epithelium ◽

Fertile Women

Microgranules have been described with different names in keratinized and in nonkeratinized epithelium. In keratinized epithelium it seems clear that the microgranules are lamellated bodies bounded by a membrane which empty their contents into the intercellular space. Their existence in nonkeratinized epithelium is more debatable. Until now the so-called microgranules have been described in nonkeratinized bucal, lingual and cervical epithelium. In the present work we describe the morphology and nature of such structures in human vaginal epithelium.Biopsies from the midlevel of the vaginal mucosa were taken from voluntary fertile women. The specimens were divided into three groups with four vaginal specimens. The first group was obtained in the folicular phase; those of the second in the postovulatory phase and, finally, the last group corresponded to the secretory phase.

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Chronic Laser Exposure Effects on Rabbit Retina

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100093523 ◽

1972 ◽

Vol 30 ◽

pp. 54-55

Author(s):

Burton B. Silver ◽

Theodore Lawwill

Keyword(s):

Laser Irradiation ◽

Laser Light ◽

Broad Band ◽

Argon Laser ◽

Atropine Sulfate ◽

Ultrastructural Changes ◽

Laser Exposure ◽

Rabbit Retina ◽

Histological Changes ◽

Threshold Doses

Dutch-belted 1 to 2.5 kg anesthetized rabbits were exposed to either xenon or argon laser light administered in a broad band, designed to cover large areas of the retina. For laser exposure, the pupil was dilated with atropine sulfate 1% and pheny lephrine 10%. All of the laser generated power was within a band centered at 5145.0 Anstroms. Established threshold for 4 hour exposures to laser irradiation are in the order of 25-35 microwatts/cm2. Animals examined for ultrastructural changes received 4 hour threshold doses. These animals exhibited ERG, opthalmascopic, and histological changes consistent with threshold damage.One month following exposure the rabbits were killed with pentobarbitol. The eyes were immediately enucleated and dissected while bathed in 3% phosphate buffered gluteraldehyde.

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Early histological changes in the aortic media after thoracic endovascular stent grafting (TEVAR)

The Thoracic and Cardiovascular Surgeon ◽

10.1055/s-0031-1297723 ◽

2012 ◽

Vol 60 (S 01) ◽

Author(s):

J Scheumann ◽

MS Bischoff ◽

C Heilmann ◽

M Siepe ◽

F Roder ◽

...

Keyword(s):

Endovascular Stent ◽

Histological Changes ◽

Stent Grafting ◽

Endovascular Stent Grafting ◽

Aortic Media

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A Computerized Coding System for Processing Basic Histopathological Changes – Application to Vascular Pathology

Methods of Information in Medicine ◽

10.1055/s-0038-1635460 ◽

1986 ◽

Vol 25 (03) ◽

pp. 139-142 ◽

Cited By ~ 2

Author(s):

A. Mauriello ◽

Y. Sambuy ◽

E. Bonanno ◽

A. Orlandi ◽

G. Palmieri ◽

...

Keyword(s):

Vascular Wall ◽

Final Diagnosis ◽

Vascular Pathology ◽

Histopathological Study ◽

Coding System ◽

Histopathological Changes ◽

Histological Changes ◽

Pathological Conditions ◽

Computer Based ◽

Sufficient Space

SummaryAmong the numerous existing computer-based systems for processing pathological data, none contains sufficient space for encoding data on the basic cytological or histological changes of a certain organ or tissue, upon which the final diagnosis is based.An “analytical record” was constructed listing all the basic changes that can be encountered in the various pathological conditions of the vascular wall. The data collected on the “analytical record” were coded by means of an alphanumeric code and stored in an Apple II 48 K minicomputer.The advantages of this system include the computerization of the data by non-specialized personnel and the possibility to’ quantitatively analyze the histocytopathological parameters used for diagnosis in vascular pathology. This coding system may easily be adapted, with minor modifications, to the histopathological study of other organs and tissues.

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