Male Reproductive System Organs and Functions
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Questions and Answers

What is the primary function of the testes?

  • Developing male secondary sex characteristics
  • Producing and storing sperm (correct)
  • Depositing sperm for fertilization
  • Regulating body temperature

    • Why is the scrotum positioned exterior to the abdominal wall?

  • To facilitate sperm deposition
  • To aid in the development of male secondary sex characteristics
  • To keep the testes at a lower temperature for sperm production (correct)
  • To protect the testes from injury

    • Which hormone is produced by the testes?

  • Progesterone
  • Estrogen
  • Oxytocin
  • Testosterone (correct)

    • What is the function of the epididymis?

    <p>Storing and transporting sperm to the ductus deferens</p> Signup and view all the answers

    How does the ductus deferens aid in sperm transport?

    <p>Its smooth muscles contract in response to sexual stimulation, forcing sperm towards the urethra</p> Signup and view all the answers

    What is the approximate length of the ductus deferens?

    <p>18 inches (46 cm)</p> Signup and view all the answers

    What is the function of the ductus deferens?

    <p>To transport and store sperm</p> Signup and view all the answers

    What procedure is performed to make a man sterile for birth control?

    <p>Vasectomy (severing the ductus deferens)</p> Signup and view all the answers

    What is the primary function of the seminal vesicles?

    <p>To produce 60% of the volume of semen</p> Signup and view all the answers

    What is the function of the prostate gland?

    <p>To secrete alkaline fluid that contributes to the motility of sperm</p> Signup and view all the answers

    What is the purpose of Cowper's glands?

    <p>To lubricate the urethra during sexual intercourse</p> Signup and view all the answers

    What is the function of the urethra in the male reproductive system?

    <p>To convey urine from the bladder and carry sperm to the outside</p> Signup and view all the answers

    What happens to the penis during sexual stimulation?

    <p>The sinuses in the erectile tissue fill with blood, causing the penis to become erect</p> Signup and view all the answers

    What is the process of developing spermatozoa called?

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

    What is the purpose of the enzyme on the head of a sperm?

    <p>To break down the coating of the egg to allow fertilization</p> Signup and view all the answers

    What is the purpose of the foreskin (prepuce) in the male reproductive system?

    <p>To protect the glans penis</p> Signup and view all the answers

    What is the primary function of the testes?

    <p>To produce and store sperm</p> Signup and view all the answers

    What is the purpose of the scrotum?

    <p>To keep the testes at normal body temperature</p> Signup and view all the answers

    What is the function of the epididymis?

    <p>To transport sperm out of the testes</p> Signup and view all the answers

    What is the role of the ductus deferens?

    <p>To transport sperm to the urethra</p> Signup and view all the answers

    What is the primary function of testosterone?

    <p>To develop male secondary sex characteristics</p> Signup and view all the answers

    How do the seminiferous tubules contribute to sperm production?

    <p>They are the site of sperm cell production.</p> Signup and view all the answers

    What is the function of the rete testis?

    <p>To transport sperm out of the testes</p> Signup and view all the answers

    What is the purpose of the smooth muscle contractions in the epididymis?

    <p>To transport sperm to the ductus deferens</p> Signup and view all the answers

    What is the approximate length of the ductus deferens?

    <p>18 inches (46 cm)</p> Signup and view all the answers

    What is the primary function of the accessory glands in the male reproductive system?

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

    What is the role of Cowper's glands in the male reproductive system?

    <p>Providing lubrication during sexual intercourse</p> Signup and view all the answers

    Which gland surrounds the neck of the bladder and secretes alkaline fluid to contribute to sperm motility?

    <p>Prostate gland</p> Signup and view all the answers

    What happens to the penis during sexual stimulation?

    <p>It becomes erect</p> Signup and view all the answers

    What occurs after ejaculation in the male reproductive system?

    <p>The penis becomes flaccid</p> Signup and view all the answers

    Which structure contains sinuses that fill with blood during sexual stimulation?

    <p>Corpus spongiosum</p> Signup and view all the answers

    What role do the seminal vesicles play in the male reproductive system?

    <p>Produce the majority of semen volume</p> Signup and view all the answers

    Which structure contains three distinct parts: head, midpiece, and tail, in a mature sperm cell?

    <p>Mature sperm</p> Signup and view all the answers

    Study Notes

    The Male Reproductive System

    • The male reproductive system consists of the testes, ductal system, accessory glands, and penis.
    • These structures have three main functions: producing and storing sperm, depositing sperm for fertilization, and developing male secondary sex characteristics.

    Testes

    • The two oval testes (or testicles) are enclosed in the scrotum, a saclike structure that lies suspended from the exterior abdominal wall.
    • The testes contain one to three coiled seminiferous tubules, which produce sperm cells.
    • The testes also produce the hormone testosterone, responsible for the development of male secondary sex characteristics.

    Epididymis

    • Sperm produced in the seminiferous tubules travel through a network of testicular ducts called the rete testis.
    • The rete testis contains cilia that sweep sperm out of the testes into the epididymis, a tightly coiled tube structure that lies superior to the testes.

    Ductal System

    • The ductus deferens (or vas deferens) is approximately 18 inches (46 cm) long and rises along the posterior wall of the testes.
    • The ductus deferens passes through the inguinal canal into the pelvic cavity, loops over the urinary bladder, and joins with the ejaculatory duct.
    • The ductus deferens and its accompanying nerves and blood vessels are enclosed in a connective tissue sheath called the spermatic cord.

    Accessory Glands

    • The accessory glands produce seminal fluid (semen) and include the seminal vesicles, prostate gland, and Cowper's glands.
    • The seminal vesicles are paired structures that lie at the base of the bladder and produce 60% of the volume of semen.
    • The prostate gland is a single, doughnut-shaped gland that surrounds the neck of the bladder and urethra.
    • Cowper's glands are two pea-sized glands under the male urethra that provide lubrication during sexual intercourse.

    Penis

    • The cylindrical penis is the organ of copulation.
    • The shaft of the penis ends with an enlarged tip called the glans penis.
    • The skin covering the penis, called the prepuce, or foreskin, lies in folds around the glans.
    • Three masses of erectile tissue, the corpus spongiosum and two corpora cavernosa, contain numerous sinuses that fill the shaft of the penis.

    Spermatogenesis

    • Spermatogenesis (the process of developing spermatozoa) begins at puberty and continues throughout life.
    • Mature sperm consist of three distinct parts: the head, midpiece, and tail, which propels the sperm.
    • Once deposited in the female reproductive system, mature sperm live approximately 48 hours (or in some cases up to 5 days).

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    Description

    Learn about the organs of the male reproductive system, including the testes, ductal system, accessory glands, and penis. Understand their functions such as sperm production and storage, sperm deposition for fertilization, and development of male secondary sex characteristics.

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