Male Reproductive System Anatomy

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Questions and Answers

Which of the following male and female reproductive organs are considered parallel?

  • Uterus and prostate
  • Fallopian tubes and vas deferens
  • Clitoris and penis
  • Ovaries and testes (correct)

The primary function of the male reproductive system is merely to facilitate urine expulsion.

False (B)

What is the term for the male gonads, which produce sperm?

Testes

Sperm mature in the ______, where they are stored temporarily.

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

Match the following male reproductive structures with their functions:

<p>Testes = Produce sperm and testosterone Epididymis = Site of sperm maturation and storage Vas deferens = Transports sperm from the epididymis to the ejaculatory duct Seminal vesicles = Secrete a nutrient-rich fluid that contributes to semen</p> Signup and view all the answers

Why are the testes located outside of the body in the scrotum?

<p>To keep them at a lower temperature for sperm development (B)</p> Signup and view all the answers

The vas deferens directly connects the testes to the urethra.

<p>False (B)</p> Signup and view all the answers

Which tube transports sperm from the epididymis to the ejaculatory duct?

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

The ______ are glands that secrete a fluid rich in nutrients which is called seminal fluid.

<p>seminal vesicles</p> Signup and view all the answers

Match the following accessory glands with their respective secretions:

<p>Seminal vesicles = Nutrient-rich seminal fluid Prostate gland = Fluid containing enzymes and citrate Bulbourethral glands = Pre-ejaculate fluid that lubricates the urethra</p> Signup and view all the answers

Which structure passes through the prostate gland towards the penis?

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

The bulbourethral glands secrete a fluid to nourish sperm.

<p>False (B)</p> Signup and view all the answers

What is the primary function of the spongy erectile tissue in the penis?

<p>To cause an erection</p> Signup and view all the answers

The tip of the penis is known as the ______.

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

Match the following components of the penis with their description:

<p>Spongy erectile tissue = Fills with blood to cause erection Urethra = Carries both urine and semen Glans penis = Sensitive tip of the penis</p> Signup and view all the answers

Which of the following lists the structures through which sperm pass, in the correct order?

<p>Testes, epididymis, vas deferens, urethra (D)</p> Signup and view all the answers

Ejaculation involves only the passage of sperm through the urethra.

<p>False (B)</p> Signup and view all the answers

Name the process by which males produce sperm continuously from puberty until death.

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

Sperm mature in the epididymis for approximately ______ days.

<p>10-14</p> Signup and view all the answers

Match the following steps of sperm transport with the structures involved:

<p>Site of sperm production = Testes Site of sperm maturation = Epididymis Transport of sperm to urethra = Vas deferens Exit pathway for sperm = Urethra</p> Signup and view all the answers

What is the main male sex hormone?

<p>Testosterone (C)</p> Signup and view all the answers

Testosterone is primarily produced by the anterior pituitary gland.

<p>False (B)</p> Signup and view all the answers

Which hormone released by the embryonic testes differentiates the fetus into a male?

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

Testosterone is responsible for the physical changes that occur during ______.

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

Match the following hormones with their function in the male reproductive system:

<p>Testosterone = Develops male characteristics and reproductive function FSH (Follicle-Stimulating Hormone) = Stimulates sperm formation LH (Luteinizing Hormone) = Signals GRH release</p> Signup and view all the answers

What happens to testosterone secretion before puberty?

<p>It decreases dramatically (D)</p> Signup and view all the answers

Gonadotropin-releasing hormone (GRH) is secreted abundantly before puberty.

<p>False (B)</p> Signup and view all the answers

What signals the hypothalamus to start secreting GRH during puberty?

<p>Increased testosterone</p> Signup and view all the answers

FSH and LH stimulate ______ formation in the male reproductive system.

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

Match the following hormones and glands to describe the hormonal control of spermatogenesis at puberty:

<p>Hypothalamus = Starts secreting GRH Anterior pituitary gland = Releases FSH and LH Testes = Respond to FSH and LH to produce sperm and testosterone</p> Signup and view all the answers

Benign Prostatic Hyperplasia (BPH) primarily affects men in which age group?

<p>Over 50 (C)</p> Signup and view all the answers

Benign Prostatic Hyperplasia (BPH) always leads to prostate cancer.

<p>False (B)</p> Signup and view all the answers

What is the primary symptom associated with Benign Prostatic Hyperplasia due to the enlargement of the prostate?

<p>Blocked urine passage</p> Signup and view all the answers

In Benign Prostatic Hyperplasia, the enlargement of the prostate narrows the ______, causing difficulty in urination.

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

Match each term related to male reproductive disorders with its description:

<p>Benign Prostatic Hyperplasia = Enlargement of the prostate gland commonly seen in older men</p> Signup and view all the answers

Which of the following is a characteristic of the testes?

<p>They produce sperm (D)</p> Signup and view all the answers

Spermatogenesis ceases entirely after the age of 50.

<p>False (B)</p> Signup and view all the answers

Name the sac that houses the testes outside the body.

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

The accessory glands contribute fluids to form ______, which carries sperm.

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

Match the male reproductive structures with their functions:

<p>Prostate gland = Contributes fluid to semen Urethra = Carries semen and urine Epididymis = Stores maturing sperm</p> Signup and view all the answers

Flashcards

Testes

Male gonads that produce sperm.

Scrotum

Sac that holds the testes outside the body.

Epididymis

Tube where sperm mature and are stored.

Vas deferens

Tube that carries sperm from the epididymis to the ejaculatory duct.

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Ejaculatory duct

Duct that passes through the prostate towards the penis.

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Seminal vesicles

Glands that secrete seminal fluid.

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Prostate gland

Gland that contributes fluid to semen.

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Bulbourethral glands

Glands that secrete fluid to lubricate the urethra.

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Penis

Organ that delivers sperm and urine to the outside.

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Spermatogenesis

Process of sperm production.

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Testosterone

Main male sex hormone.

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Gonadotropin-releasing hormone (GRH)

Hormone that enables release of FSH and LH at puberty.

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Benign Prostatic Hyperplasia

Enlargement of the prostate gland.

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Testes

The oval-shaped glands that sit outside the body in the scrotum.

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Study Notes

  • The male reproductive organs are parallel to the female reproductive organs, for example, the ovaries are parallel to the testes.
  • Male reproductive anatomy and hormones are explored.

Male Anatomy

  • In the male system, the gonads are the testes.
  • The testes produce the sperm that unites with the egg (ovum).
  • The male reproductive system includes structures that are a system of ducts that work to release sperm.
  • The testes (singular: testis) are oval-shaped glands in a sac called the scrotum outside the body.
  • Sperm cannot develop at normal body temperature because it is too hot.
  • The epididymis sits on the posterior part of the testis, in which the sperm mature in coiled ducts.
  • The vas deferens is a tube that goes from the epididymis, moving superiorly to the bladder, then posteriorly to meet the other vas deferens at the seminal vesicles.
  • The ejaculatory duct comes off the seminal vesicles and passes through the prostate towards the penis.

Accessory Glands

  • Seminal vesicles secrete a nutrient-rich fluid called seminal fluid.
  • Prostate gland.
  • Bulbourethral glands.
  • The penis delivers sperm and urine to the outside and consists of:
    • Spongy erectile tissue engorges with blood to stiffen and cause an erection.
    • Urethra.
    • Glands penis (tip of the penis beneath the foreskin).

Path of Sperm

  • Sperm is made in the testes.
  • Sperm mature in the epididymis for 10-14 days.
  • The vas deferens stores and move sperm from the epididymis to the urethra.
  • Sperm goes through the ejaculatory duct, mixing with fluid from accessory glands that protect and nourish the sperm.
  • During ejaculation, sperm and fluids (semen) pass through the urethra and out of the body.
  • Males produce sperm from puberty until death, unlike the female reproductive system.
  • The process of sperm creation is called spermatogenesis.

Reproductive Physiology Hormones

  • Testosterone is the main male sex hormone.
  • Testosterone is released by the embryonic testes to make the fetus a male.
  • Testosterone is responsible for physical changes during puberty.
  • Very little testosterone is secreted until puberty.
  • Until puberty, the hypothalamus blocks the secretion of gonadotropin-releasing hormone (GRH).
  • The testes secrete much more testosterone at puberty.
  • The increase in testosterone signals the hypothalamus to secrete gonadotropin releasing hormone (GRH).
  • GRH signals the anterior pituitary gland to release FSH and LH.
  • FSH and LH stimulate gamete (sperm) formation.

Disorders of the Male Reproductive System

  • Benign Prostatic Hyperplasia.
  • Benign Prostatic Hyperplasia is the enlargement of the prostate, commonly seen in men over 50 years of age.
  • This enlargement blocks the passage of urine and narrows the urethra.

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