Male Reproductive System
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Questions and Answers

What is the main function of the epididymis in the male reproductive system?

  • To produce sperm
  • To secrete hormones that regulate sperm production
  • To filter out abnormal sperm
  • To store and mature sperm (correct)

    • Which of the following nerves is responsible for the innervation of the testis?

  • Genitofemoral nerve (correct)
  • Pudendal nerve
  • Ilioinguinal nerve
  • Spermatic nerve

    • What is the primary function of the prostate gland?

  • To regulate testosterone levels
  • To produce sperm
  • To produce fluids that make up semen (correct)
  • To store and mature sperm

    • What is the layer of the anterior abdominal wall from which the layers covering the spermatic cord develop?

    <p>Extraperitoneal fascia</p> Signup and view all the answers

    What is the structure that passes through the prostate gland and opens into the urethra?

    <p>Ejaculatory duct</p> Signup and view all the answers

    What is the mechanism involved in the erection of the penis?

    <p>Relaxation of the smooth muscle in the corpora cavernosa</p> Signup and view all the answers

    What is the primary component of the spermatic cord?

    <p>Ductus deferens</p> Signup and view all the answers

    What is the arterial supply of the ductus deferens?

    <p>Superior vesical artery</p> Signup and view all the answers

    What is the secretion of the seminal glands?

    <p>Thick alkaline fluid</p> Signup and view all the answers

    Where do the veins from the ductus deferens drain into?

    <p>Testicular vein</p> Signup and view all the answers

    What is the location of the seminal glands in relation to the prostate?

    <p>Superior to the prostate</p> Signup and view all the answers

    What is the location of the bulbo-urethral glands in relation to the urethra?

    <p>Posterolateral to the urethra</p> Signup and view all the answers

    What is the main function of the prostate gland?

    <p>To produce seminal fluid</p> Signup and view all the answers

    What is the location of the prostate gland in relation to the bladder?

    <p>Surrounding the bladder</p> Signup and view all the answers

    What is the main component of the ejaculatory duct?

    <p>Union of the ductus deferens and seminal gland</p> Signup and view all the answers

    What is the venous drainage of the seminal glands?

    <p>Accompanying arteries</p> Signup and view all the answers

    What is the anterior lobe of the prostate gland historically referred to as?

    <p>Isthmus</p> Signup and view all the answers

    What separates the right and left lobes of the prostate gland posteriorly?

    <p>A central shallow longitudinal furrow</p> Signup and view all the answers

    What is the relationship between the inferoposterior lobule and the urethra?

    <p>It lies posterior to the urethra</p> Signup and view all the answers

    What branch of the internal iliac artery do the prostatic arteries arise from?

    <p>The prostatic arteries are direct branches of the internal iliac artery</p> Signup and view all the answers

    What is the major part of the prostate gland formed by?

    <p>The inferolateral lobule</p> Signup and view all the answers

    What is the relationship between the anteromedial lobule and the proximal prostatic urethra?

    <p>It is directly lateral to the proximal prostatic urethra</p> Signup and view all the answers

    What occurs during parasympathetic stimulation in the mechanism of erection?

    <p>The lumen of helicine arteries dilates, increasing blood flow to the cavernous spaces</p> Signup and view all the answers

    What is the result of the contraction of the bulbospongiosus and ischiocavernosus muscles during erection?

    <p>Veins are compressed, allowing blood to flow out of the corpora cavernosa</p> Signup and view all the answers

    During emission, what is delivered to the prostatic urethra through the ejaculatory ducts?

    <p>Semen</p> Signup and view all the answers

    What is the level of sympathetic response responsible for emission?

    <p>L1-L2</p> Signup and view all the answers

    What is the result of ejaculation?

    <p>The penis returns to its flaccid state of remission</p> Signup and view all the answers

    Which of the following vessels drains the prostatic venous plexus?

    <p>Internal iliac veins</p> Signup and view all the answers

    What is necessary for ejaculation to occur?

    <p>Closure of the internal urethral sphincter and contraction of the urethral muscles</p> Signup and view all the answers

    What is the function of the dartos muscle in the scrotum?

    <p>To cause the wrinkled appearance of the scrotum</p> Signup and view all the answers

    Which nerve supplies the anterior scrotal nerves?

    <p>Genital branch of the genitofemoral nerve</p> Signup and view all the answers

    What is the function of the tunica vaginalis?

    <p>To separate the visceral and parietal layers with a small amount of fluid</p> Signup and view all the answers

    Which of the following ligaments anchors the erectile tissue to the pubic symphysis?

    <p>Suspensory ligament</p> Signup and view all the answers

    What is the name of the median fold that passes from the prepuce to the urethral surface?

    <p>Frenulum</p> Signup and view all the answers

    Which of the following arteries supplies the fibrous tissue around the corpora cavernosa?

    <p>Dorsal arteries of the penis</p> Signup and view all the answers

    Where does the deep dorsal vein of the penis drain into?

    <p>Prostatic venous plexus</p> Signup and view all the answers

    Which of the following muscles is located in the superficial perineal pouch?

    <p>Ischiocavernosus muscle</p> Signup and view all the answers

    What is the name of the cutaneous ridge that marks the line of fusion of the embryonic labioscrotal swellings?

    <p>Scrotal raphe</p> Signup and view all the answers

    Study Notes

    Male Reproductive System

    Testes and Epididymis

    • Location: Scrotum
    • Structure: Paired reproductive glands that produce sperm and male hormones
    • Covered by: Tunica Vaginalis (visceral layer) and Tunica Albuginea (tough fibrous outer surface)

    Vas Deferens, Seminal Vesicles, and Ejaculatory Ducts

    • Vas Deferens:
      • Continuation of the Epididymis
      • Thick muscular wall and small lumen
      • Begins at the inferior pole of the testes and ascends posterior to the testis medial to the epididymis
      • Primary component of the spermatic cord
      • Penetrates the anterior abdominal wall via inguinal canal
    • Seminal Vesicles:
      • Elongated structure that lies between the fundus of the bladder and the rectum
      • Place obliquely superior to the prostate
      • Do not store sperm
      • Secretion: thick alkaline fluid, fructose, and coagulating agent
    • Ejaculatory Ducts:
      • Formed by the union of the seminal glands and ductus deferens
      • Formed near the neck of the bladder
      • Run through the posterior part of the prostate and along either side of the prostatic utricle
      • Converge to open on the seminal colliculus by tiny apertures

    Prostate Gland

    • Location: Largest accessory gland in the male reproductive system
    • Structure: Surrounds the prostatic urethra
    • Composition: Two-thirds glandular and one-third fibromuscular
    • Relationships:
      • Base: closely related to the base of the bladder
      • Apex: in contact with fascia on the superior aspect of the urethral sphincter and deep perineal muscles
      • Anterior surface: muscular, separated from the pubic symphysis by retroperitoneal fat in the retropubic space
      • Posterior surface: related to the ampulla of the rectum
      • Inferolateral surface: related to levator ani muscle

    Prostate Gland: Lobes

    • Isthmus: lies anterior to the urethra, fibromuscular, and represents a superior continuation of the external urethral sphincter muscle to the neck of the bladder
    • Right and left lobes: separated posteriorly by a central shallow longitudinal furrow, and separated anteriorly by the isthmus

    Prostate Gland: Zones

    • Not explicitly mentioned in the text

    Prostate Gland: Blood Supply, Nerve Innervation, and Lymphatic Drainage

    • Arterial supply: branches of the internal iliac artery, inferior vesical arteries, internal pudendal arteries, and middle rectal arteries
    • Venous drainage: veins join the prostatic venous plexus, which drains into the internal iliac veins
    • Lymphatic drainage: drains into the internal iliac nodes and sacral lymph nodes

    Bulbo-Urethral Glands

    • Location: posterolateral to the intermediate part of the urethra, largely embedded within the external urethral sphincter
    • Structure: two pea-sized glands
    • Function: mucous-like secretion
    • Ducts: pass through the perineal membrane with the intermediate urethra and open through many apertures in the proximal part of the spongy urethra in the bulb of the penis

    Scrotum

    • Structure: cutaneous sac consisting of two layers: pigmented skin and dartos fascia
    • Divided internally by the septum of the scrotum, which is a continuation of the dartos fascia
    • Scrotal raphe: a cutaneous ridge marking the line of fusion of the embryonic labioscrotal swellings

    Scrotum: Blood Supply, Nerve Innervation, and Lymphatic Drainage

    • Arterial supply: posterior scrotal branches of the perineal artery, anterior scrotal branches of the deep external pudendal artery, and cremasteric artery
    • Venous drainage: accompanies the arteries
    • Lymphatic drainage: drains into the superficial inguinal lymph nodes

    Penis

    • Structure: consists of thin skin, connective tissue, blood vessels, lymphatics, fascia, corpora, and the spongy urethra
    • Parts: root, body, and glans
    • Ligaments: suspensory ligament and fundiform ligament

    Penis: Internal Structure

    • Composed of three cylindrical cavernous bodies: paired corpora cavernosa and corpus spongiosum
    • Cavernous bodies: each covered with fibrous capsule called the tunica albuginea, and covered with deep fascia of the penis (Buck fascia)

    Penis: Blood Supply, Nerve Innervation, and Lymphatic Drainage

    • Arterial supply: dorsal arteries of the penis, deep arteries of the penis, and arteries of the bulb of the penis
    • Venous drainage: deep dorsal vein of the penis, which joins the prostatic venous plexus
    • Lymphatic drainage: drains into the superficial external pudendal vein

    Mechanism of Erection and Ejaculation

    • Erection: occurs when the corpora cavernosa and corpus spongiosum become engorged with blood at the arterial pressure, causing the erectile bodies to become turgid and elevate the penis
    • Ejaculation: results from the closure of the internal urethral sphincter at the neck of the urinary bladder, contraction of the urethral muscles, and contraction of the bulbospongiosus muscles

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    Male Reproductive System PDF

    Description

    Quiz about the male reproductive system, covering the structure and function of the testes, epididymis, vas deferens, seminal vesicles, and scrotum. Learn about the blood supply, nerve innervation, and lymphatic drainage of the male reproductive organs.

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