Page 294 - Veterinary Histology of Domestic Mammals and Birds, 5th Edition

Male reproductive system 13

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(organa genitalia masculina)

The male reproductive system consists of the:
· stroma:
− tunica vaginalis,
· testes (sperm production),
· epididymides (sperm maturation and transport), − tunica albuginea,
· deferent ducts (sperm transport), − tunica vasculosa,
· accessory sex glands: − septula testis,
− terminal portion of the deferent ducts, − mediastinum testis,
− prostate gland, − lobuli testis,
− vesicular glands, − interstitial connective tissue (intestinum testis)
− bulbourethral glands and with Leydig cells (endocrinocyti interstitiales),
· penis. · parenchyma:
− convoluted seminiferous tubules (tubuli seminif-
eri convoluti),
Not all accessory glands are present in all species (Figure
13.1). Accessory glands are absent in birds. − straight testicular tubules (tubuli seminiferi recti),
− rete testis and
Testis − ductuli efferentes testis.
The paired testes are responsible for production of sper-
matozoa and synthesis of male sex hormones. Based on Stroma
structural and functional characteristics, the tissues of the The testis is surrounded by a collagen-rich connective tis-
testes are classified as: sue capsule, the tunica albuginea (ca. 1–2 mm thick). The
tunica albuginea lies immediately internal to the visceral
layer of the tunica vaginalis.

13.1 Reproductive organs of the dog (schematic; König and Liebich, 2009).

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