scholarly journals The Vasculature of the Guinea-Pig Thymus: Topographic Studies by Light and Electron Microscopy

1987 ◽  
Vol 50 (3) ◽  
pp. 299-314 ◽  
Author(s):  
Seiji KATO ◽  
Gutta I. SCHOEFL
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Light And Electron Microscopy

scholarly journals Ultrastructural analysis of the spermatogenesis in the guinea pig (Cavia porcellus)

2016 ◽  
Vol 36 (suppl 1) ◽  
pp. 89-94 ◽  
Author(s):  
Luciana S. Simões ◽  
Rose E.G. Rici ◽  
Phelipe O. Favaron ◽  
Taís Harumi de Castro Sasahara ◽  
Rodrigo S.N. Barreto ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Sexual Development ◽  
Morphological Changes ◽  
Light And Electron Microscopy ◽  
Management Systems ◽  
Cavia Porcellus ◽  
Reproductive Parameters ◽  
Development Stages ◽  
Transmission Electron

Abstract: al for both, the establishment of appropriate management systems, and for the use of new species as animal models. In this study, we used light and electron microscopy to characterize the sexual development stages of the guinea pig (Cavia porcellus) in specimens of 30, 45 and 90 days of age. We observed the differentiation of spermatocytes only through transmission electron microscopy in the leptotene, zygotene and pachytene phases of meiosis, in 30-day-old animals. During puberty, there was differentiation of the germinative epithelium and formation of the acrosome. Spermatozoa, however, were not detected. Thus, we could infer that puberty happens after 45 days of age. Sexual maturity was evident in 90-day-old specimens. Our results showed that changes in the testicular germinative epithelium during the postnatal sexual development in guinea pig led to morphological changes, including the ones related to the development of Leydig and Sertoli cells, which are directly related to puberty. In this work, we provide new morphological subsidies for a better understanding of reproductive parameters of this species, enabling its use as an animal model in the field of the reproductive biology.

scholarly journals ATTACHMENT REACTION OF THE UTERINE LUMINAL EPITHELIUM AT IMPLANTATION: LIGHT AND ELECTRON MICROSCOPY OF THE HAMSTER, GUINEA-PIG, RABBIT AND MINK

Reproduction ◽  
1972 ◽  
Vol 29 (1) ◽  
pp. 131-NP ◽  
Author(s):  
K. HEDLUND ◽  
O. NILSSON ◽  
S. REINIUS ◽  
G. AMAN
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Light And Electron Microscopy ◽  
Luminal Epithelium

Light- and electron microscopy of isolated vestibular hair cells from the guinea pig

1991 ◽  
Vol 266 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Eric Scarfone ◽  
Mats Ulfendahl ◽  
Paula L�fstrand ◽  
�ke Flock
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Hair Cells ◽  
Light And Electron Microscopy ◽  
Vestibular Hair Cells

scholarly journals CARDIAC MUSCLE

1968 ◽  
Vol 36 (3) ◽  
pp. 497-526 ◽  
Author(s):  
Joachim R. Sommer ◽  
Edward A. Johnson
Keyword(s):  
Electron Microscopy ◽  
Skeletal Muscle ◽  
Sarcoplasmic Reticulum ◽  
Guinea Pig ◽  
Cardiac Muscle ◽  
Extracellular Space ◽  
Light And Electron Microscopy ◽  
Rabbit Heart ◽  
Contraction Coupling ◽  
The Difference

With light and electron microscopy a comparison has been made of the morphology of ventricular (V) and Purkinje (P) fibers of the hearts of guinea pig, rabbit, cat, dog, goat, and sheep. The criteria, previously established for the rabbit heart, that V fibers are distinguished from P fibers by the respective presence and absence of transverse tubules is shown to be true for all animals studied. No evidence was found of a permanent connection between the sarcoplasmic reticulum and the extracellular space. The sarcoplasmic reticulum (SR) of V fibers formed couplings with the sarcolemma of a transverse tubule (interior coupling) and with the peripheral sarcolemma (peripheral coupling), whereas in P fibers the SR formed only peripheral couplings. The forms of the couplings were identical. The significance, with respect to excitation-contraction coupling, of the difference in the form of the couplings in cardiac versus skeletal muscle is discussed together with the electrophysiological implications of the differing geometries of bundles of P fibers from different animals.

Effect of Human Fibrin Adhesive on the Ear An Electrophysiological Study of Auditory Function in the Guinea Pig Correlated to Light and Electron Microscopy of Middle Ear Mucosa and Inner Ear Structures

1986 ◽  
Vol 102 (3-4) ◽  
pp. 257-265 ◽  
Author(s):  
Svein Mjøen ◽  
Henrik H. Lindeman ◽  
Gisle Djupesland ◽  
Barbara Schüler ◽  
Arne Sundby ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Inner Ear ◽  
Middle Ear ◽  
Electrophysiological Study ◽  
Light And Electron Microscopy ◽  
Auditory Function ◽  
Middle Ear Mucosa ◽  
Fibrin Adhesive

CGRP-like immunoreactivity in the guinea pig organ of Corti: A light and electron microscopy study

1989 ◽  
Vol 42 (1) ◽  
pp. 83-95 ◽  
Author(s):  
Mariola Sliwinska-Kowalska ◽  
Marianne Parakkal ◽  
Mark E Schneider ◽  
Jörgen Fex
Keyword(s):  
Electron Microscopy ◽  
Guinea Pig ◽  
Light And Electron Microscopy ◽  
Organ Of Corti ◽  
Microscopy Study ◽  
Electron Microscopy Study

The Morphology of Vacuolated Cells in the Liver Following Administration of Vitamin A.

1973 ◽  
Vol 31 ◽  
pp. 408-409
Author(s):  
Odell T. Minick ◽  
Hidejiro Yokoo ◽  
Fawzia Batti
Keyword(s):  
Electron Microscopy ◽  
Body Weight ◽  
Vitamin A ◽  
Light And Electron Microscopy ◽  
Liver Cells ◽  
Prominent Feature ◽  
Vascular Space ◽  
Vacuolated Cell ◽  
Vacuolated Cells ◽  
Vacuolated Cytoplasm

Vacuolated cells in the liver of young rats were studied by light and electron microscopy following the administration of vitamin A (200 units per gram of body weight). Their characteristics were compared with similar cells found in untreated animals.In rats given vitamin A, cells with vacuolated cytoplasm were a prominent feature. These cells were found mostly in a perisinusoidal location, although some appeared to be in between liver cells (Fig. 1). Electron microscopy confirmed their location in Disse's space adjacent to the sinusoid and in recesses between liver cells. Some appeared to be bordering the lumen of the sinusoid, but careful observation usually revealed a tenuous endothelial process separating the vacuolated cell from the vascular space. In appropriate sections, fenestrations in the thin endothelial processes were noted (Fig. 2, arrow).

Sign in / Sign up

Export Citation Format

Share Document