PMID: 2751120Jan 1, 1989

Fetal membranes and placenta of the African green monkey (Cercopithecus aethiops)

Anatomy and Embryology
G E OwitiA G Hendrickx


This study examined developmental changes in fetal membranes and placenta of Cercopithecus aethiops from a Carnegie developmental stage 12 embryo to near-term fetuses. Ultrastructurally, yolk sac cells (endoderm and mesothelium) were similar to comparable stages in other primates. Endodermal cells had few apical microvilli, abundant rough-endoplasmic reticulum, electron dense mitochondria and dense bodies. In contrast, mesothelial cells were squamous with numerous microvilli, small mitochondria and a few short strands of rough endoplasmic reticulum. Amnion cells early in gestation were squamous with few microvilli, large glycogen deposits and poorly developed cytoplasmic components. Tight junctions and desmosomes held adjacent cells together. The basal surface was smooth and the basal lamina was distinct. As development proceeded the amniotic cells became cuboidal and possessed numerous microvilli. Cytoplasmic organelles were better developed and glycogen deposits increased by mid-gestation. A thick layer of microfibrils and collagen fibers was prominent below the basal lamina. Near-term, the glycogen had virtually disappeared and the amount of lipid droplets increased. Basal infoldings and podocytic processes and the extracell...Continue Reading


Jan 1, 1975·American Journal of Obstetrics and Gynecology·J J MartinekG F Essig
Jan 1, 1979·Journal of Medical Primatology·D L HessG H Stabenfeldt
May 1, 1975·American Journal of Obstetrics and Gynecology·R M WynnJ A Harris
Nov 1, 1975·Theriogenology·A C Andersen, A G Hendrickx
Nov 1, 1977·American Journal of Obstetrics and Gynecology·J A Thliveris, L Speroff
Jan 1, 1976·Gynecologic Investigation·D R AbramovichL Jandial
Jul 1, 1985·Placenta·C J Jones, C D Ockleford
Jan 1, 1987·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·D W MorrishO Siy
Jan 1, 1987·Anatomy and Embryology·R P TararaJ G Else
Jan 1, 1986·Acta Anatomica·G E OwitiA G Hendrickx
Dec 1, 1970·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·R B DreskinW B Greene
Mar 1, 1974·American Journal of Obstetrics and Gynecology·R M Wynn
Jan 1, 1969·Zeitschrift für Zellforschung und mikroskopische Anatomie·A D Hoyes
Sep 1, 1969·The American Journal of Anatomy·M L Houston
Jul 1, 1971·Journal of Reproduction and Fertility·A M LawnC A Finn
Nov 1, 1969·The American Journal of Anatomy·H Hesseldahl, J F Larsen
Feb 15, 1971·American Journal of Obstetrics and Gynecology·R M WynnA H MacLennan
Jan 1, 1971·Acta Anatomica·H Hesseldahl, J Falck Larsen
Dec 1, 1968·Journal of Ultrastructure Research·M Knoth
Aug 1, 1965·Journal of Ultrastructure Research·C E Thomas
Jun 15, 1967·American Journal of Obstetrics and Gynecology·T C Barton, C Baker
Mar 1, 1980·The American Journal of Anatomy·B F King
Oct 1, 1963·Journal of Ultrastructure Research·J A TERZAKIS
Mar 1, 1965·American Journal of Physical Anthropology· Van Wagenen, H R Catchpole


Mar 1, 1996·Pediatric Surgery International·Z Zachariou, R Daum
Sep 11, 1999·Clinica Chimica Acta; International Journal of Clinical Chemistry·S QanungoM Mukherjea
Jan 21, 2015·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·A M CarterRobert Pijnenborg
Sep 1, 1993·The Journal of Experimental Zoology·B F King
Jul 23, 2020·Frontiers in Physiology·Lauren RichardsonArum Han
Aug 1, 1997·The Anatomical Record·L ShandleyE M Wintour

Related Concepts

Structure of Amnion
Cercopithecus tantalus
Extraembryonic Membranes
Electron Microscopy
Yolk Sac

Trending Feeds


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.

Synthetic Genetic Array Analysis

Synthetic genetic arrays allow the systematic examination of genetic interactions. Here is the latest research focusing on synthetic genetic arrays and their analyses.

Congenital Hyperinsulinism

Congenital hyperinsulinism is caused by genetic mutations resulting in excess insulin secretion from beta cells of the pancreas. Here is the latest research.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

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.

Epigenetic Memory

Epigenetic memory refers to the heritable genetic changes that are not explained by the DNA sequence. Find the latest research on epigenetic memory here.

Cell Atlas of the Human Eye

Constructing a cell atlas of the human eye will require transcriptomic and histologic analysis over the lifespan. This understanding will aid in the study of development and disease. Find the latest research pertaining to the Cell Atlas of the Human Eye here.

Femoral Neoplasms

Femoral Neoplasms are bone tumors that arise in the femur. Discover the latest research on femoral neoplasms 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.