evolve into labia in females.

Diagram of internal differentiation

thumbA.--Diagram of the primitive urogenital organs in the embryo previous to sexual distinction.
* 3. Ureter.
* 4. Urinary bladder.
* 5. Urachus.
* cl. Cloaca.
* cp. Elevation which becomes clitoris or penis.
* i. Lower part of the intestine.
* ls. Fold of integument from which the labia majora or scrotum are formed.
* m, m. Right and left Müllerian ducts uniting together and

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