PMID: 1200394Jun 9, 1975Paper

Ultrastructure of gonadal ridge in male and female pig embryos

Anatomy and Embryology
L J Pelliniemi

Abstract

Pig embryos aged 21-22 days (d) obtained from artificially inseminated sows for an ultrastructural study of the development and sex differentiation of the gonadal ridge. The chromosomal sex of the embryos was identified by a chromosome analysis. At the age of 21 d the gonadal ridge consisted of three different tissues: the surface epithelium, the primitive cords, and the mesenchyme. The surface epithelial cells contained elongate mitochondria with lamellar cristae, granular endoplasmic reticulum (GER), the Golgi complex, free polysomes, coated vesicles and fine filaments. The epithelium was continuous with the primitive cords, which were composed of ultrastructurally similar cells. The epithelial basal lamina followed the cord surface, but covered it incompletely. Primordial germ cells (PGC) were located under the surface epithelium in the mesenchyme and in the cords. The nucleus with a prominent nucleolus, and the large mitochondria were round. The cytoplasm contained a pair of centrioles, the Golgi complex, solitary lamellae of the GER, free polysomes, lipid droplets and some coated vesicles. The PGC entered the gonadal cords before these were surrounded by the continuous basal lamina. A day later (22 d) the number and length...Continue Reading

References

Jan 1, 1976·Acta Anatomica·L J Pelliniemi, A L Salonius
Sep 1, 1975·The American Journal of Anatomy·L J Pelliniemi
Mar 1, 1974·Comparative Biochemistry and Physiology. A, Comparative Physiology·C U Christensen
Sep 26, 1970·Lancet·O P Gray
Jan 1, 1973·Annual Review of Biochemistry·W J RutterP W Morris
Jun 1, 1972·European Journal of Immunology·F M KourilskyJ Dausset
Jul 1, 1973·The American Journal of Anatomy·L Zamboni, H Merchant
Jan 1, 1969·Zeitschrift für Zellforschung und mikroskopische Anatomie·A D Hoyes
Jan 1, 1967·Annals of Human Genetics·H Grüneberg
Nov 1, 1969·The American Journal of Anatomy·H Hesseldahl, J F Larsen
May 1, 1968·The Anatomical Record·J L Black, B H Erickson
Jun 1, 1969·The American Journal of Anatomy·D L Odor, R J Blandau
Jul 1, 1966·The Journal of Clinical Endocrinology and Metabolism·A H BaillieD M Hart
Jul 1, 1967·Developmental Biology·R L TrelstadJ D Revel
Jul 25, 1958·The Journal of Biophysical and Biochemical Cytology·M L WATSON
Feb 1, 1961·The Journal of Biophysical and Biochemical Cytology·J H LUFT
May 1, 1963·The Journal of Cell Biology·M G FARQUHAR, G E PALADE
Sep 1, 1964·The Journal of Cell Biology·J G STEMPAK, R T WARD
May 1, 1965·The Journal of Cell Biology·J H VENABLE, R COGGESHALL
Feb 1, 1965·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·D W FAWCETT
Mar 1, 1965·American Journal of Physical Anthropology· Van Wagenen, H R Catchpole
Aug 1, 1952·The Anatomical Record·B M PATTEN

❮ Previous
Next ❯

Citations

Mar 1, 1990·Theriogenology·A J ZiecikJ H Britt
Mar 25, 2000·Theriogenology·H Shim, G B Anderson
Feb 7, 1998·Molecular and Cellular Endocrinology·P ParmaC Cotinot
Sep 13, 2012·Anatomy Research International·Yanfei Yang, Ali Honaramooz
Jul 23, 2013·PLoS Genetics·Yueh-Chiang HuDavid C Page
May 1, 1980·The Annals of Otology, Rhinology, and Laryngology·M S SalamatD R Peacor
Apr 1, 1997·Molecular Reproduction and Development·Y TakagiV G Pursel
Apr 1, 1994·Molecular Reproduction and Development·M C LavoirK J Betteridge
Oct 1, 1991·Journal of Electron Microscopy Technique·H WartenbergC Schmolke
Nov 1, 1982·The American Journal of Anatomy·C J van VorstenboschC J Wensing
Sep 1, 1975·The American Journal of Anatomy·L J Pelliniemi
Jan 1, 1982·The Journal of Audiovisual Media in Medicine·L J Pelliniemi, J Mäki

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.