Male Reproductive System

Muscle raising and lowering testes temperature

Cremaster Muscle

Dense connective tissue covering testes

Tunica Albuginea

Where does Spermatogenesis occur ?

Seminiferous Tubules

Main Functions

Produce hormones

Produce sperm

Transport sperm

Male gamete

Sperm

Organ producing sperm and testosterone

Testes

Function of the scrotum

Holds testes and regulates temp

How many chromosomes do spermatids contain ?

23

What is spermatogenesis

Production and development of sperm cells

Function of epididymis

Sperm maturation/storage

Structure transporting sperm to epididymis

Ductus Vas Deferens

Contractions moving sperm through ductus

Peristaltic contractions

3 necessary glands of male reproductive system

Seminal Gland (60% of semen)

• secretes fructose (energy)

  posterior to bladder

Prostate Gland

• secretes milky acidic fluid with seminalplasmin (antibiotic)

• Inferior to bladder

Bulbourethral Gland

• secretes thick alkaline mucus neutralizes urinary acids and lubricates glans

Gland producing most semen volume

Seminal vesicle

Why is semen slightly alkaline

To neutralize acidic environments in urethra and vagina

cowper’s gland

Bulbourethral

Normal sperm count

20-100 million /ml

Nervous System controlling erection

Parasympathetic

Nervous system controlling ejaculation

Sympathetic

What erectile tissue fills with blood during erection

Corpora cavernosa and corpus spongiosum

Two dorsal cylindrical masses

Corpora cavernosa

Corpus Spongiosum

Single ventral mass surrounding the urethra