Historical name for the anatomical "ring" of lymphoid tissue in the pharynx (adenoids, tubal tonsils, palatine tonsils, lingual tonsils). Named after Heinrich Wilhelm Gottfried von Waldeyer-Hartz (1836 - 1921) a German anatomist.
A fetal disorder caused by exposure of a fetus to Warfarin (Coumadin®), an anticoagulation chemical (inhibits synthesis of vitamin K dependent clotting factors, including factors II, VII, IX, and X, and the anticoagulant proteins C and S.1). The exact effect of fetal damage from warfarin therapy during pregnancy is difficult to determine with variable impact on several different systems.
This syndrome is characterized by acute encephalopathy followed by chronic impairment of short-term memory, due to an inborn error of metabolism that is clinically important only with diet's inadequate in thiamine (thiamine deficiency alone is not sufficient to cause the syndrome).
Placental cord (umbilical cord) gelatinous connective tissue composed of myofibroblast-like stromal cells, collagen fibers, and proteoglycans. Increases in volume (myxomatous, connective tissue embedded in mucus) at parturition to assist closure of placental blood vessels. Matrix cells from Wharton's jelly have recently been identified as a potential source of stem cells. This placental cord substance is named after Thomas Wharton (1614-1673) an English physician and anatomist who first described it.
Reproductive change in female mice either singly or housed together (in groups) can be induced into estrus by exposure to male mouse urine or their dirty bedding.
(More? Mouse Development- Estrous Cycle)
A form of kidney/renal cancer (nephroblastoma) named after Dr Max Wilms who first described the tumor. This childhood kidney cancer is caused by the inactivation of a tumour suppressor gene (BRCA2) or Wilms tumor-1 gene (Wt1) and is one of the most common solid tumors of childhood, occurring in 1 in 10,000 children and accounting for 8% of childhood cancers. Wt1 also required at early stages of gonadal development.
(WTAP) protein expressed in extraembryonic tissues and required for the formation of embryonic mesoderm and endoderm.
(More? Wilm's tumour)
also called the main pancreatic duct (MPD) forms within the dorsal pancreatic bud, present in the body and tail of the pancreas. Named after Johann Georg Wirsung (1589 - 1643) a German physician who worked as a prosector in Padua and discovered the duct in a cadaver in 1642. Note an accessory pancreatic duct (APD, also called Santorini’s duct) may be present as an anatomical variation due to the embryological origin of the pancreas from two pancreatic buds (dorsal and ventral).
Historic common term used to describe the postnatal effects of an estrogen increase on the neonatal breast, which leads to aberrant milk production. This increase is probably from loss of the negative feedback effects of steroids from the placenta.
historic rat embryo staging system named after author, one of several such embryo staging methods.
a secreted glycoprotein patterning switch with different roles in different tissues. The name was derived from two drosophila phenotypes 'wingless' and 'int' and the gene was first defined as a protooncogene, int1. Humans have at least 4 WNT genes encoding secreted glycoproteins with at least one wnt receptor called Frizzled (FZD). Wnt7a is secreted protein and binds to extracellular matrix. The mechanism of Wnt distribution (free diffusion, restricted diffusion and active transport) and all its possible cell receptors are still being determined. In the gastrointestinal system, Wnt maintains the pool of undifferentiated intestinal progenitor cells and control maturation and correct positioning of the Paneth cell (a differentiated intestinal cell type).
(= mesonephric duct, preferred terminology), A developmental duct that runs from the mesonephros to cloaca. The duct in male differentiates to form the vas deferens and in female regresses. Named after Caspar Friedrich Wolff (1733-1794), a German scientist and early embryology researcher and is said to have established the doctrine of germ layers.
Search the NIH Medlineplus Medical Dictionary Type the word that you would like to find. If unsure of spelling, type the first few letters, followed by an asterisk(*).
Use this page to access brief definitions of specific alphabetically listed embryology terms. Additional information can be accessed from links listed at the end of each definition. Glossary from the UNSW Embryology program compiled and written by Dr Mark Hill. Reference Material used in preparing Glossary List: Texts listed on page 1 Reading of each notes section, Department of Anatomy Publications, WWW resources from NCBI, AMA (USA), Office of Rare Diseases (USA), PubMed Medline Dictionaries, MSDS, Merck Manual home edn., NHMRC (Australia).
These notes are for Educational Purposes Only.
Please email Dr Mark Hill if you wish to make a comment about this current project.