Mesonephric tubules

Mesonephric tubules
Mesonephric tubules
Latin tubuli mesonephrici
Code TE E5.6.2.1.0.0.1;
E5.7.2.1.0.0.2

Mesonephric tubules are genital ridges that are next to the mesonephros.

In males, some of the mesonephric kidney tubules, instead of being used to filter blood like the rest, they "grow" over to the developing testes, penetrate it, and become connected to the seminiferous tubules of the testes.

The sperm differentiate inside the seminiferous tubules, then swim down these tubes, then through these special mesonephric tubules, and go down inside Wolffian duct, to the coelom and finally to the organ the animal uses to transport sperm into females.

It gives rise to the epoophoron, paroöphoron[1], and paradidymis.[1]

References

  1. ^ a b Fix, James D.; Dudek, Ronald W. (1998). Embryology. Baltimore: Williams & Wilkins. p. 177. ISBN 0-683-30272-8. 

External links

v · d · ePrenatal development/mammalian embryogenesis · Development of the urinary and reproductive organs (GA 11.1204, TE E5.6-7)
Common urinary and
reproductive system
Urinary system
development

Nephrogenic cord → Kidney

Nephrotome → Pronephros · Mesonephros (Mesonephric tubules)

WD → Ureteric bud + Metanephrogenic blastema

US → Urinary bladder + Urethra + Primary urethral groove + Urachus
Reproductive system
development
Primarily internal
Primarily 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
Homologues

M: URI

anat/phys/devp/cell

noco/acba/cong/tumr, sysi/epon, urte

proc/itvp, drug (G4B), blte, urte

M: ♀ FRS

anat/phys/devp

noco/cong/npls, sysi/epon

proc/asst, drug (G1/G2B/G3CD)

M: ♂ MRS

anat/phys/devp

noco/cong/tumr, sysi/epon

proc, drug (G3B/4BE/4C)

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