What is the correct sequential pathway of sperm transport from the site of production to the external urethral meatus?

Answer and explanation

Correct answer: D. Seminiferous tubules -> Rete testis -> Vasa efferentia -> Epididymis -> Vas deferens -> Urethra

  1. Step 1: Spermatozoa are produced in the seminiferous tubules and pass into the network of channels called the rete testis.
  2. Step 2: From the rete testis, 10–20 fine ciliated vasa efferentia conduct sperm into the highly convoluted epididymis (where maturation and motility are acquired).
  3. Step 3: From the cauda epididymis, sperm ascend through the vas deferens, loop over the ureter, join the seminal vesicle duct to form the ejaculatory duct, and empty into the prostatic and penile urethra.
Answer
Seminiferous tubules Rete testis Vasa efferentia Epididymis Vas deferens Ejaculatory duct Urethra.
Why not the others: The option 'Seminiferous tubules -> Epididymis -> Rete testis -> ...' incorrectly places the epididymis before the rete testis; The option beginning with the rete testis places it before the seminiferous tubules; The option 'Seminiferous tubules Vasa efferentia Rete testis ...' reverses the rete testis and vasa efferentia.

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