Male reproduction system

The parietal perineum forms __ pouch(es) between neighbouring pelvic viscera. Name it/them.

1, recto-vesical pouch

Identify

1. Parietal peritoneum

2. Recto-vesical pouch

The male reproductive system consists of which organs?

• Scrotum

• Testes

• Epididymis

• Penis

• Ductus deferens

• Urethra

• Urinary bladder

• Seminal vesicles

• Prostate

• Bulbourethral gland

Identify

1. Penis

2. epididymis

3. Testis

4. Scrotum

identify

1. Urinary bladder

2. Urethra

3. Penis

4. Testis

5. Scrotum

6. Epididymis

7. Ductus deferens

8. Bulbourethral gland

9. Prostate

10. Seminal vesicles

What is the function of the testes?

Sperm production → undifferentiated male germ cells that undergo spermatogenesis to produce mature sperm

More specifically, within the testes, it is then________ that produce the sperm. The ___________, from the testicular vein, serves as a countercurrent heat exchange mechanism. The epididymis is where ___________

Seminiferous tubules, pampiniform plexus, sperm is matured and stored

Identify

1. Testicular artery

2. Pampiniform plexus

3. Epididymis

4. Ductus deferens

5. Tunica albuginea

6. Lobule

7. Seminiferous tubules

Give the function and other characteristics of the ductus deferens

It is a duct that transports sperm from epididymis to the seminal vesicle

• originally named vas deferens

Give the function and other characteristics of the seminal vesicles

They are paired glands, posters-lateral to the bladder

Function: produce seminal fluid (a viscous secretion) → seminal fluid contributes to semen, provides nutrient to sperm and helps buffer the acidity of the vaginal canal

Give the function and other characteristics of the ejaculatory duct

It is a duct formed by the union of the seminal vesicles and ductus deferens in the prostate

• sends seminal vesicle secretion and sperm (from ductus deferens) to urethra

identify

1. Ductus deferens

2. Seminal vesicles

3. Testis

4. Epididymis

5. Ejaculatory duct

What are the functions and parts of the urethra?

Functions:

• Void the bladder for urine

• Pathway for semen

Parts:

1. Pre-prostatic urethra

2. Prostatic urethra

3. Membranous urethra

4. Spongy/penile urethra (contained within the corpus spongiosum)

Identify (+ give function of structure 2)

1. Bladder

2. Internal urethral sphincter → closes during ejaculation to prevent semen from entering the bladder

3. Spongy urethra

4. Membranous urethra

5. Prostatic urethra

6. Pre prostatic urethra

Give the functions and characteristics of the prostate gland

It is a walnut sized gland inferior to the bladder, surrounding the urethra; covered by dense connective tissue

Function: production of a fluid that, together with sperm cells from the testicles and fluids from other glands, makes up semen (a thin milky liquid that helps sperm motility and contains other proteins and enzymes)

• Prostate specific antigen is an enzyme that makes the semen thinner

Give the functions and characteristics of the bulbourethral gland

A gland found within the urogenital diaphragm

• Function: secretes lubricating fluid for sperm to pass easily through the urethra during ejaculation

What are the 2 main parts of the penis ?

1. Glans penis - contains high concentrations of sensory receptors

2. Shaft: composed of three compartments of erectile tissue

   • Corpus cavernosa (2, paired)

   • Corpus spongiosum (contains the spongy urethra)

Identify

1. Corpus cavernosa

2. Tunica albuginea

3. Corpus spongiosum

4. Spongy urethra

What are the two erectile muscles?

Ischiocavernosus (paired) and bulbospongiosus (unpaired)

For ischiocavernosus: what is its action, innervation, and blood supply?

Action: helps compress the crus of the penis to maintain and stabilize the erect penis

Innervation: pudendal nerve

Blood supply: perineal artery

For bulbospongiosus: what is its action, innervation, and blood supply?

Action: acts To expel remaining urine from the urethra after the bladder has completed its emptying, also aids in the final stages of erection by compressing the veins within the bulb of the penis to maintain erection

Innervation: pudendal nerve

Blood supply: perineal artery

Identify

1. Bulbospongiosus

2. Bulb of penis

3. Ischiocavernosus

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