Results 21 to 30 of about 145,048 (308)

A left circumflex aorta with a displaced thoracic duct in a 94-year-old male cadaver: a case report with discussion on embryology

open access: yesFolia Morphologica, 2023
A left circumflex aorta (LCA) is an extremely rare variation of the thoracic aorta. It is distinguished by a retroesophageal descending aorta that subsequently travels down the right side of the thoracic vertebrae towards the aortic hiatus.
P. Ostrowski   +5 more
doaj   +1 more source

Retrocaval ureter - a case report

open access: yesNational Journal of Clinical Anatomy, 2013
Retrocaval ureter is a rare congenital anomaly which has a incidence of occurence of one in 1500 live births. It is known to occur 2.8 times more commonly in males than females.
Margaret Chinnappan, M Elangovan
doaj   +1 more source

Design and manufacture of embryological models for didactic use

open access: yesBioscience Journal, 2019
Some areas of knowledge are usually related to a high degree of abstraction involved in the object studied. In the case of the embryology study, for instance, the students’ learning difficulties are recurrent due to a lack of didactic resources, which ...
Henrique Nunes Pereira Oliva   +2 more
doaj   +1 more source

Introduction to Zoology. T. H. Savory. New York: Philosophical Library, 1968. viii, 239 pp. $6.00. [PDF]

open access: yes, 2017
Excerpt: This book would delight the traditional zoologist as its emphasis is on systematics and evolution. primarily based on morphology. By the author\u27s own admission he neglects areas concerning histology, embryology, physiology and genetics, while
Nelson, Sigurd, Jr.
core   +3 more sources

To Be or not to Be? A Critical Appraisal of the Welfare of Children Conceived through New Reproductive Technologies [PDF]

open access: yes, 2008
Over three million children are believed to have been born worldwide - and over 200,000 annually - as a result of “new reproductive technologies” (NRTs).
Blyth, Eric
core   +1 more source

Retinoic Acid and the Development of the Endoderm

open access: yesJournal of Developmental Biology, 2015
Retinoic acid (RA) is an important signaling molecule in the development of the endoderm and an important molecule in protocols used to generate endodermal cell types from stem cells.
Gregory M. Kelly, Thomas A. Drysdale
doaj   +1 more source

Isolated persistent left superior vena cava: A case report and its clinical implications

open access: yesAnnals of Cardiac Anaesthesia, 2017
The venous anomaly of a persistent left superior vena cava (PLSVC) affects 0.3%-0.5% of the general population. PLSVC with absent right superior vena cava, also termed as "isolated PLSVC," is an extremely rare venous anomaly.
Samarjit Bisoyi   +7 more
doaj   +1 more source

Still Hazy After All These Years: The Law Regulating Surrogacy [PDF]

open access: yes, 2012
In 1997, Margaret Brazier was asked by the then Government to chair a review of the laws regulating surrogacy. The subsequent Brazier Report made a number of recommendations, including the need for greater regulation and the tightening of ‘expenses ...
Horsey, Kirsty, Sheldon, Sally
core   +1 more source

Ovule-to-seed development in Dovyalis caffra (Salicaceae: Flacourtieae) with notes on the taxonomic significance of the extranucellar embryo sac

open access: yesBothalia: African Biodiversity & Conservation, 2005
Dovyalis caffra (Hook.f. & Harv.) Hook.f. is a widespread and horticulturally important southern African endemic. Here described, ovule-to-seed development represents the first embryological information on this genus of the tribe Flacourtieae, Salicaceae 
E. M. A. Steyn   +2 more
doaj   +1 more source

The Morphogenesis Of Evolutionary Developmental Biology [PDF]

open access: yes, 2003
The early studies of evolutionary developmental biology (Evo-Devo) come from several sources. Tributaries flowing into Evo-Devo came from such disciplines as embryology, developmental genetics, evolutionary biology, ecology, paleontology, systematics ...
Gilbert, Scott F.
core   +2 more sources

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