Male reproductive organs

Created by kmcdaniel223 

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40 terms

What are the testes?

-male gonads

What are the functions of the testes?

-to produce sperm
-to produce testosterone, the male sex hormone

What is each testis surrounded by?

-tunica albuginea

What is the tunica albuginea covered by?

-a shiny, white CT capsule

What covers the tunica albuginea?

-the tunica vaginalis

What are the two layers of the tunica vaginalis?

-the visceral tunica vaginalis and the parietal tunica vaginalis?

Where do the sperm travel to on their way to the pelvic cavity? (Describe the route)

-released into the "pipes" of the testes
-epididymis
-ductus deferens/vas deferens
-ductus deferens passes through the spermatic cord
-ductus deferens enters the pelvic cavity through the inguinal canal

Epididymus

-worm-shaped structure sitting on top of and along the length of each testis

Spermatic cord

-suspends the testes inside two fibromuscular sacs (scrotum)

What are the two fibromuscular sacs that make up the scrotum called?

-dartos muscle
-cremaster muscle

What is the role of the dartos muscle and the cremaster muscle?

-temperature regulation

What is the dartos muscle made from?

-smooth muscle

Where is the dartos muscle found?

-woven into the scrotum

What is the cremaster muscle made from?

-skeletal muscle

Where is the cremaster muscle found?

-surrounding each testicle

Where does the ductus deferens run once it enters the pelvic cavity?

-enters the pelvic cavity through the inguinal canal
-wraps around the roof and posterior of the urinary bladder
-enlarges posteriorly (ampulla)
-becomes the ejaculatory duct
-becomes the urethra
-urethra travels inside the penis

What are the accessory glands of the male reproductive system?

-two seminal vesicles
-prostate (chestnut-shaped)
-bulbourethral (Cowper's) glands (pea-shaped and sized)

What is the role of the accessory glands?

-to add aqueous secretions ("seminal fluid") to the sperm

What is the combination of sperm and seminal fluid referred to as?

-semen

What is the posterior enlargement of the vas deferens called?

-ampulla

What are the two main components of the penis?

-body (shaft)
-glans (head)

What is the opening on the tip of the glans called?

-external urethral orifice

What is the role of the external urethral orifice?

-final point of exit for the urine or semen from the male body

What is the broad lip-shaped base of the glans called?

-the corona

What is the glans typically protected by?

-prepuce
-"foreskin"
-retractable skin covering

What is the prepuce secured ventrally by?

-frenulum
-short piece of skin

How is the penile body suspended from the abdominal wall?

-via the suspensory ligament

In its flaccid state, which aspect of the penis contains the dorsal blood vessels and nerves?

-the penis' anterior aspect

What three sets of specialized tissues does the penis contain?

-corpus spongiosum (on ventral aspect)
-corpus spongiosum is flanked dorsally by the paired corpora cavernosa (singular = corpus cavernosum)

What temperature does sperm production require?

-35 degrees celsius

What is core body temperature?

-37 degrees celsius

What is the gubernaculum?

-a "string" at the body of the testes

What is the gubernaculum facilitate/assist?

-aids in the descent of the male testes
-used to pull testes down into the scrotum

What is the pampiniform plexus?

-a network of veins in the spermatic cord

What important role does the pampiniform plexus perform?

-cools blood traveling to the testes within the testicular artery

What method is used to transfer heat from the testicular artery to the panpiniform plexus?

-countercurrent convection

What is the fluid released by the seminal vesicles called? What is it composed of?

-seminal fluid
-"high fructos corn syrup"--water and sugar

What happens to the prostate as men age?

-the prostate enlarges

What is this process called?

-benign prostatic hypertrophy

What do the cowpers/bulbourethral glands secrete?

-fluid to make the urine in the urethra less acidic

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