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( Index, Outline)
Seminiferous tubules are located in the testes, and are the specific location of meiosis, and the subsequent creation of gametes, namely spermatozoa.
epithelium of the tubule consists of sustentacular or Sertoli cells, which are tall, columnar type cells that line the tubule.
In between the Sertoli cells are
spermatogenic cells, which differentiate through meiosis to sperm cells.
There are two types: convoluted and straight, convoluted toward the lateral side, and straight as the tubule comes medially to form ducts that will exit the testis.
The seminiferous tubules are formed from primitive
sex cords. It is the medullary cords which develop into the seminiferous tubules and the cortical cords regress. The cords were formed from the gonadal ridge.
Additional images Edit
Seminiferous tubule (right) with
(black, tiny, ovoid).
Transverse section through the left side of the scrotum and the left testis. (Semeniferous tubules visible in center, but not labeled.)
External links Edit
Male reproductive system
layers (skin, Dartos, External spermatic fascia, Cremaster, Internal spermatic fascia) • Perineal raphe • Spermatic cord
layers ( Tunica vaginalis, Tunica albuginea) • Appendix • Mediastinum • Lobules • Septa • Leydig cell • Sertoli cell • Blood-testis barrier
Spermatogonium • Spermatocytogenesis • Spermatocyte • Spermatidogenesis • Spermatid • Spermiogenesis • Spermatozoon
Seminiferous tubules ( Tubuli seminiferi recti, Rete testis, Efferent ducts) • Epididymis ( Appendix) • Vas deferens • Ejaculatory duct Seminal colliculus
Internal urethral orifice • Urethra ( Prostatic, Intermediate, Spongy) • Urethral crest • Urethral gland • External urethral orifice
Corpus cavernosum • Corpus spongiosum • Navicular fossa of male urethra • Glans penis • Fundiform ligament • Suspensory ligament • Foreskin • Frenulum
Seminal vesicles ( Excretory duct of seminal gland) • Prostate ( Prostatic utricle, Prostatic sinus) • Bulbourethral glands
File:Seminiferous tubule.JPG microscopic shot of seminiferous tubule (cross section)
File:Rattestis.jpg photomicrograph of rat testis