Male Reproductive System | Anatomy

What are the organs of the male reproductive system that produce, support, and transport sperm cells?

• Testes

• Epididymis

• Ductus Deferens

• Ejaculatory Duct

• Urethra

• Seminal Vesicles

• Prostate Gland

• Bulbourethral glands

• Penis

What organs of the male reproductive system are responsible for producing sperm cells?

Testes

What organs of the male reproductive system are responsible for transporting sperm cells?

• Epididymis

• Ductus Deferens

• Ejaculatory Duct

• Urethra

What organs of the male reproductive system are responsible for contributing fluids for semen?

• Accessory Glands

• Seminal Vesicles

• Prostate Gland

• Bulbourethral glands

What organs of the male reproductive system are responsible for means of delivering sperm cells to the female?

Penis

What are the male gonads?

Testes

• where sperm is produced

What is an external sack that supports the testes?

• has loose skin that helps to keep the testes several degrees cooler than body temp

  • for sperm development

Scrotum

What is a smooth muscle that wrinkles the scrotal skin?

• helping to pull it closer to the body to increase temp when needed

• by relaxing it unwrinkles the skin

  • allowing testes to fall further away from the body to cool

Dartos Muscle

How is the scrotum divided?

2 compartments

• each housing one testicle

What is a connective tissue that supports and protects the testes?

Tunica Vaginalis

What extends upward into the body cavity and has blood vessels, nerves, and ductus deferens

The spermatic cord

What surround the spermatic cord and when it contracts, pulls the testes up into or closer to the body?

• muscle that pulls testes up close enough to the body so that when they get cold, they warm up

Cremaster muscle

What is very important during sperm production?

Temperature control

What are the two muscle groups that help control the temperature of the testes?

• Dartos

• Cremaster

What is the white fibrous connective tissues that makes up the testes and forms the

• Septa that divides the testes into lobules

• Helps hold lobules in place

Tunica Albuginea

What is within each lobule of the testes?

Seminiferous Tubules

What specific part of the testes produces sperm?

Seminiferous Tubules

When sperm is produced in the Seminiferous Tubules, it moves out of the tubules and into the?

Rete testis

• connect Seminiferous Tubules to the epididymis via the straight tubules and efferent ducts

What is important so that the sperm can mature, be stored, and removed from the body

The Duct system

• Epididymis

• Ductus Deferens

• Ejaculatory Duct

• Urethra

What part of the duct system is being described:

• Coiled tube

• Site of sperm maturation and storage

Epididymis

What part of the duct system is being described:

• Passes into the pelvic cavity

• Terminal end forms the Ampulla

Ductus Deferens

What part of the duct system is being described:

• Formed by the Ampulla of ductus deferens and seminal vesicle duct

• Penetrates prostate and empties into the urethra

Ejaculatory Ducts

Why are the two ejaculatory ducts?

Because there are

• two testes with

• two ductus deferens so there must be

• two ejaculatory ducts for each side

What part of the duct system is being described:

• Extends from the urinary bladder to the tip of the penis

• 3 segments:

  • Prostatic

  • Membranous

  • Spongy

Urethra

What are the three segments of the urethra?

• Prostatic Urethra

• Membranous Urethra

• Spongy (penile) urethra

Which urethral segment is being described:

• Passes through prostate gland

Prostatic Urethra

Which urethral segment is being described:

• Within urogenital diaphragm

Membranous Urethra

Which urethral segment is being described:

• Within the penis and opens at the external urethral orifice

Spongy (penile) urethra

What passes through the urethra?

• Urine

• Semen

• Sperm

The accessory glands of the male reproductive system contribute seminal fluid. Why is seminal fluid important?

Because it provides buffers and nutrients for sperm motility and survival

What is something to know about the vaginal canal?

It is very acidic

• why semen needs to be very alkaline

  • for sperm to survive

What accessory gland is being described:

• Posterior wall of the urinary bladder

• Produce viscous alkaline secretion which forms 60% of the semen volume

Seminal Vesicles

Why is it important that the semen be alkaline?

So when it gets to the female vagina (which is very acidic) the sperm in the semen does not die

What accessory gland is being described:

• Inferior to the urinary bladder

• Prostatic fluid comprises 25% of the semen volume

Prostate Gland

What accessory gland is being described:

• Located on either side of membranous urethra within the urogenital diaphragm

• Produce alkaline mucus to lubricate spongy urethra and neutralizes acidic vagina

Bulbourethral Glands

What are the external genitalia of the male reproductive system?

• Scrotum

• Penis

What is a pouch of loose skin suspended from the root of the penis?

• Apart of the external genitalia for the male reproductive system

Scrotum

What is a passage way for urine, semen, and sperm? What are its three parts?

Penis

• Root

• Shaft

• Glans Penis

Which part of the penis is being described:

• Closest to the body

Root

Which part of the penis is being described:

• Contains erectile tissue:

  • Corpora Cavernosa (Paired Cylinder)

  • Corpus Spongiosum

Shaft

Which part of the shaft if being described

• Erectile

• Paired Cylinder

• Lie outside of the corpus spongiosum

• Fill with blood during sexual excitation

  • causes an erect penis

Corpora Cavernosa

Which part of the shaft if being described

• Surrounds the urethra to help keep it open

• Lower part of shaft

Corpus Spongiosum

Which part of the penis is being described:

• On the Distal end

• Expanded portion of the corpus spongiosum

• Speculation that it creates a vacuum

  • when male pulls penis back out again it creates a vacuum that then pulls any sperm back out of female that was deposited by a previous male

Glans Penis