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Embryology
Embryonic structures with corresponding adult structures
41
Medical
Professional
12/15/2008

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Term
Truncus Arteriosus
Definition
Aorta, Pulmonary Trunk
Term
Bulbus Cordis
Definition
Smooth part of Right (Conus Arteriosus) and Left (Aortic Vestibule) Ventricle
Term
Primitive Ventricle
Definition
Trabeculated part of Left and Right Ventricle
Term
Primitive Atrium
Definition
Trabeculated part of Left and Right Atrium
Term
Sinus Venosus
Definition
Smooth part of right atrium (sinus venarum), coronary sinus, oblique vein of atrium
Term
3rd Aortic Arch
Definition
Common and internal carotid arteries
Term
4th aortic arch
Definition
right subclavian (proximal part) and part of aortic arch
Term
Posterolateral Branches of Dorsal Aorta
Definition
arteries to extremities, intercostal, lumbar and lateral sacral arteries
Term
Lateral branches of Dorsal Aorta
Definition
renal, sacral, and gonadal arteries
Term
Vitelline Arteries
Definition
Celiac, Superior and Inferior Mesenteric Arteries
Term
Umbilical Arteries
Definition
Medial umbilical folds
Term
Vitelline Veins
Definition
Hepatic veins and sinusoids, ductus venosus, part of IVC, portal, inferior and superior mesenteric, splenic veins
Term
Left Umbilical Vein
Definition
Ligamentum Teres
Term
Cardinal Veins
Definition
Internal Jugular, SVC, part of IVC, common iliac, renal, gonadal, intercostal, azygos, and hemiazygos veins
Term
Foregut
Definition
Esophagus, stomach, liver, gallbladder, pancreas, upper abdomen (to first part of duodenum)
Term
Tracheoesophageal septum
Definition
divides foregut into esophagus and trachea
Term
Hepatic Diverticulum
Definition
Liver and Gallbladder
Term
Septum Transversum
Definition
Diaphragm
Term
Ventral Pancreatic Bud
Definition
part of Head and Uncinate process of pancreas
Term
Dorsal Pancreatic Bud
Definition
rest of head, body, and tail of pancreas
Term
Midgut
Definition
Lower duodenum, jejunum, ileum, cecum, vermiform appendix, ascending colon and proximal 2/3 of transverse colon
Term
Hindgut
Definition
Distal 3rd of transverse colon, descending, sigmoid colon, rectum, upper anal canal
Term
Cloaca
Definition
rectum and anal canal
Term
Proctodeum (from ectoderm)
Definition
lower anal canal
Term
Ventral Mesentery
Definition
Lesser omentum(hepatoduodenal and hepatogastric ligaments), falciform, coronary and triangular ligaments

[mesenteries and ligaments above the lesser curvature of the stomach in the ABDOMEN]
Term
Dorsal Mesentery
Definition
Greater omentum (gastrorenal, gastrosplenic, gastrocolic, splenorenal ligaments), mesentery of small intestine, mesoappendix, transverse and sigmoidal mesocolon

[mesenteries below the greater curvature of the stomach... mostly GI related in the ABDOMEN]
Term
Metanephric mesoderm
Definition
glomerulus, bowman's capsule, proximal convoluted tubule, loop of henle, distal convoluted tubule, collecting tubule

[filtration units in the kidney]
Term
Ureteric Bud
Definition
collecting duct, major calyx, minor calyx, renal pelvis, ureter

[transporting urine aspect of KIDNEY]

outgrowth of MESONEPHRIC mesoderm
Term
Urogenital Sinus
Definition
urinary bladder, inferior 2/3 of vagina, female urethra, vaginal vestibule, male urethra (prostatic, membranous, proximal penile), prostate
Term
Glandular plate
Definition
Distal part of penile (spongy) urethra
Term
Allantois
Definition
Urachus (median umbilical fold)
Term
Gubernaculum
Definition
Ovarian ligament, round ligament of the uterus

gubernaculum testes in males - anchors testes within scrotal sac
Term
Processus vaginalis
Definition
Tunica vaginalis in males

NOTHING in females
Term
Gonads
Definition
Females: Ovary, primordial follicle, rete ovary

Males: Testes, seminiferous tubules, tubuler recti, rete testes, lydig and sertoli cells [everything in Testes]
Term
Paramesonephric ducts (Mullerian)
Definition
Females: Uterine tubes, uterus, cervix, superior 3rd of vaginal, (hydatid of morgagni-vestigal)

Males: Appendix of testes
Term
Mesonephric ducts (Wolfian)
Definition
Females: vestigial - Appendix vesiculos, ducts of gartner

Males: epididymis, ductus deferens, seminal vesicles, ejaculatory duct, prostatic urethra, appendix of epididymis
Term
Mesonephric Tubules
Definition
Females: vestigial - epoophoron, paraophoron

Males: Efferent ductules,
paradidymis (vestigial)
Term
Phallus/Genital Tubercle
Definition
Females: Clitoris

Males: Glans and body of penis
Term
Urethral Folds
Definition
Females: Labia minora

Males: Ventral aspect of penis
Term
Genital Swellings
Definition
Females: Labial majora, mons pubis

Males: Scrotum
Term
Respiratory Diverticulum - Lung buds - Bronchial Buds
Definition
Lungs and Bronchi
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