What are four exocrine secretions in the male reproductive system?
The male reproductive system has an endocrine secretion
(testosterone) and 4 exocrine secretions in semen: sperm, seminal
vesicle fluid (60%), prostatic fluid (25%), and an alkaline
secretion from the Bulbourethral (Cowper's) glands that neutralizes
the acidic male urethra and secretes mucous that lubricates the
urethra and glans.
Endocrine secretions are released in the blood and exocrine
secretions are released externally, not into the blood stream.