Obstetric and also Newborn treatment I > great > great 01: Reproductive Anatomy and Physiology > 1.10 male Reproductive Organs

a. Testes (Two).

The testes room two almond-shaped glands whose attributes are for the manufacturing of sperm and testosterone.

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The testes are suspended in the scrotal sac outside the abdominopelvic cavity. That is believed that the testes lie exterior the body cavity since they are very sensitive to heat and also the greater temperature within the human body is unfavorable to the production of sperm.

Each testis is enclosed by a tough, white fibrous capsule called the tunica albuginea. Expansion of the capsule divides it into a huge number the lobes. Each lobe has four strict coiled seminiferous tubules (this is the place of yes, really sperm production). The seminiferous tubules empty sperm right into the testicular network where they take trip to the epididymis. The epididymis is located external of the testis (see figures 1-8 and also 1-9).

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Figure 1-9. Structure of the testes.

b. Duct System.

The duct mechanism is the passageway because that the sperm to exit the body. It has the epididymis and also the vas deferens. (1) Epididymis. The epididymis is a coiled tube about 20 inches long. That caps the superior part of the testis and also runs under its posterior side. It develops the an initial part of the duct system and provides a short-term storage site for immature sperm.

When the male is sexually stimulated, the wall surfaces of the epididymis contract to expel sperm right into the next part of the duct system. (2) Vas deferens (ductus deferens). The sperm continue their journey through the vas deferens. The vas deferens runs upwards indigenous the epididymis v the inguinal canal into the pelvic cavity and also arches end the bladder (see figure 1-8). That is enclosed with blood vessels and nerves in a connective tissue sheath, which is dubbed a spermatic cord. The vas deferens empties into the ejaculatory duct the carries the sperm with the process to empty right into the urethra.

c. Accessory Glandular Structure.

The accessory glandular structure consists of the seminal vesicles, prostate gland, Cowper’s glands, and the penis.

(1) Seminal vesicles. The 2 seminal vesicles room pouches that save sperm. Sixty percent of liquid volume that semen (seminal fluid) is created there. The cheap is wealthy in street (fructose), i beg your pardon nourishes and activates the sperm passing through the tract.

(2) Prostate gland. The prostate gland is a solitary gland about the size and shape that a chestnut. It encircles the top area that the urethra just below the bladder. It secretes a milky alkaline fluid, which has actually the function in protecting the sperm versus acid conditions of the vagina.

(3) Cowper’s glands. The cowper’s glands room tiny pea-sized glands inferior to the prostate. They kind a thick, clear mucus, i beg your pardon drains into the urethra. The secretion is believed to serve generally as a lubricant throughout sexual intercourse.

(4) Penis. The dick is a cylinder-shaped organ located externally ~ above the mons pubis, immediately above the scrotum. The is made of erectile tissue with cavern-like spaces in it. At the moment of sex-related excitement, blood fills these spaces, changing the soft, limp cock to an enlarged, rigid, erect organ.

The smooth lid of the dick is called the glans penis and is spanned by a wrinkles of loosened skin that forms the headlock foreskin. Surgical removal of this foreskin, called circumcision, is frequently performed. The penis also serves as component of the urinary tract in the male.


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