Primordial phallus

Phallus
Stages in the development of the external sexual organs in the male and female.
Details
Latin	phallus primordialis
Identifiers
Gray's	p.1213
Code	TE E5.7.4.0.1.0.2
Anatomical terminology

In embryology, the primordial phallus refers to the clitoris of a female or the penis in the male, particularly during fetal development of the urinary and reproductive organs, before sexual differentiation is evident. This is also the case for the immature male analog, the immature glans penis.

External links

phallus at eMedicine Dictionary

Development of the urinary and reproductive systems

Common

Mesoderm
- Intermediate mesoderm
- Lateral plate mesoderm ("LPM")

Endoderm → Cloaca → Urogenital sinus ("US")

Endoderm+Ectoderm → Cloacal membrane

Urinary system

Nephrogenic cord → Kidney

Nephrotome → Pronephros

Mesonephros (Mesonephric tubules)

Mesonephric duct → Ureteric bud + Metanephrogenic blastema

US → Urinary bladder + Urethra + Primary urethral groove + Urachus

Reproductive system

Internal	Gonadal ridge → Indifferent gonad → Gonadal cord (Cortical cords, Testis cords) Pronephric duct → Mesonephric (Wolffian) duct + Paramesonephric (Müllerian) duct (Vaginal plate) Urogenital sinus → Prostate or Skene's gland

External	LPM Genital tubercle → Labioscrotal swelling → Scrotum or Labia majora LPM → Genital tubercle → Primordial phallus → Penis or Clitoris IM → Gubernaculum Peritoneum → Processus vaginalis or Canal of Nuck

See also

Index of the urinary system

Description	Anatomy Physiology Development Cells

Disease	Electrolyte and acid-base Congenital Neoplasms and cancer Other Symptoms and signs eponymous Urine tests findings Blood tests

Treatment	Procedures Drugs potassium and phosphate Intravenous fluids

Index of reproductive medicine

Description	Anatomy male female Physiology menstrual cycle Development sex determination and differentiation

Disease	Infections STD and STI Congenital male female Neoplasms and cancer male female gonadal germ cell Other male female Symptoms and signs eponymous

Treatment	Procedures male female Drugs benign prostatic hypertrophy erectile dysfunction and premature ejaculation sexual dysfunction infection STDs hormones androgens estrogens progestogens GnRH prolactin Assisted reproduction Birth control hormonal