Download Unit 2 Embryology Germ Layers Table

©2009 Mark Tuttle
Neural crest
cells
Glans portion of
male urethra
(Navicular fossa)
GASTROINTESTINAL
REPRODUCTIVE
ECTODERM
URINARY
EMBRYOLOGY GERM LAYERS: UNIT 2
ENDODERM
MESODERM
- Yolk Sac Endoderm
Coelomic Mesoderm (Cortex)
Mesenchyme (Medulla)
o Primordial germ cells
- Gonadal Cord
- Leydig Cells
- Penile raphe
o Seminiferous tubules
- Ovarian Stroma
- UG sinus - Pelvic
o Sertoli Cells
- Prostatic stroma
o Glands of Littre
o Straight Tubules
- Fibromuscular wall of vagina
o Prostatic parenchyma
o Rete Testis
- Genital eminence (tubercle)
o Bulbourethral gland
- Cortical Cord ( Secondary Gonadal –
o Clitoris
- Greater vestibular glands
female only)
o Penis
- Covering of UG folds
o Follicular cells
- UG Fold
- Sinovaginal bulbs
o Rete Ovarii
o Urethral seam
o Epithelium of vagina
- Paramesonephric duct
o Labia Minora
o Uterus
- Labioscrotal swelling
o Labia Majora
o Mons Pubis
- UG sinus - Pelvic
- Intermediate mesoderm
o Epithelial lining of urinary
o Upper urinary system
bladder (except for
o Pronephric kidney
trigone)
o Mesonephric kidney
o Membranous urethra
o Metanephric kidney
- UG sinus – Phallic
o Ureter
o Spongey urethra (males
- Splanchnic mesoderm
only)
o CT and smooth muscle of the urethra (both sexes)
o Entire female urethra
- Trigone of bladder
-
Epithelium of GI
Spleen
Splanchnic mesoderm of ventral mesentery
o CT of Liver
o Endothelium of Liver
o Kupffer cells
Neural crest
cells of the GI
(Symp/parasymp
to GI)
©2009 Mark Tuttle
EMBRYOLOGY REPRODUCTIVE COMMON ORIGINS : UNIT 2
KEY: Bold indicates a functional structure
Embryologic structure
Gubernaculum
Male adult structure
- Gubernaculum testis
Mesonephric tubules
-
Efferent ductules of testis
Paradidymis
Duct of epididymis
Ductus (Vas) deferens
Ureter, pelvis, calices, collecting tubules
Ejaculatory duct
Seminal vesicle
Appendix of epididymis
Appendix of testis
Urogenital Sinus
-
Urinary bladder
Urethra (except navicular fossa)
Prostate gland
Bulbourethral glands
Sinus tubercle
Phallus
Urogenital folds
Labioscrotal swellings
-
Seminal colliculus
Penis
Ventral aspect of penis
Scrotum
Mesonephric duct
Paramesonephric duct
Female adult structure
- Ovarian ligament
- Round ligament of uterus
- Epoophoron
- Paroophoron
- Ureter, pelvis, calices, collecting tubules
- Appendix vesiculosa (Vesicular appendage)
- Duct of epoophoron
- Longitudinal duct, Gartner duct
- Lesser Vestibular Gland (Skene’s)
-
Uterine tube
Uterus
Hydatid of Morgagni
Urinary bladder
Urethra
Vagina
Urethral and paraurethral glands
Greater vestibular glands
Hymen
Clitoris
Labia Minora
Labia Majora