15
Human Reproduction
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Human Reproduction
14
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The Male Reproductive System
Nocturnal emission
From the beginning of puberty, the penis can spontaneously erect during sleep, especially in the early morning. The erection is often accompanied by ejaculation. This is perfectly normal, and is one of the proofs of a healthy functioning of the reproductive system.
Male reproductive organs can also be categorised into two groups: external and internal reproductive organs. They primarily serve the production of gametes and sexual intercourse. Testicles also produce male hormones that regulate the development of reproductive organs and secondary sex characteristics, the development of the musculoskeletal system, as well as sperm production, libido and male fertility.
External
reproductive organs
These are the scrotum and the penis.
Penis
It is composed of 3 cylindrical
bodies of spongy tissue. In addition
to its sexual function, the penis
acts as a conduit for urine.
Scrotum
A suspended sack of skin and smooth muscle tissue that contains the testicles and epididymides. It serves to maintain the optimal temperature for testicles.
Urethra
The canal through which urine exits the body. Males use
their urethra for both
urination and ejaculation.
Internal reproductive organs
The male internal reproductive organs are the testicles, the epididymides, the prostate, the sperm duct and the seminal vesicle.
Sperm duct (vas deferens)
A tube with a muscular wall. Its peristaltic contractions propel
semen forwards during ejaculation.
Prostate
It secretes a fluid that forms part
of semen.
Epididymis
It stores the sperm produced in the testicles.
Testicle
It produces sperm cells and testosterone (male sex hormone), which promotes sperm maturation, and the development of a masculine figure and body hair.
