Male reproduction lecture 7

what are other Endocrine organs

kidneys (erythropoietin (EPO))

Adipose Tissue (leptin)

GI Tract, Heart, skeleton, skin, thymus

leptin produced by adipose does what?

“Tells” your body how much stored energy (as fat) you have.

Binds CNS neurons producing sensation of satiety.

Environmental pollutants industrial chemicals, and pesticides can

disrupt endocrine function. like Bisphenol A (BPAs) mimics estrogen.

The function of reproduction

produce gametes (Eggs, sperm)

fuse gamete (zygote)

what is the scrotum

Sac of skin containing sperm-producing testes.

why is the scrotum outside the body

Sperm not produced well at body temperature. (Cooler temp. needed and Adjustable)

what are some testicular problems

Elegant thermoregulation (rupture and torsion)

Testicular Cancer (most common in young men (15-35), 90% curable if found early)

The function of the Penis

Delivers sperm

Foreskin around head

3 bodies of erectile tissue (Spongy network of connective tissue with vascular spaces)

what are the erections and erectile dysfunction (ED)?

Parasympathetic reflex releases nitric oxide (NO)

Viagra (a hypertension drug)

Parasympathetic reflex releases nitric oxide (NO) does is to

Relaxes smooth muscle in blood vessels and Erectile tissue fills with blood

Sperm leaves testes and enters

Epididymis

then Ductus (Vas) deferens

next Ejaculatory duct

finally the urethra

(EDEU)

what does the Epididymis do

Immature sperm leaves testes and stored in tail

Epithelial cells absorb excess testicular fluid.

what does the ductus (vas) deferens

leaves epididymis

peristalsis

Joins seminal gland duct

why is the vasectomy done?

for the male duct system not to releases sperm

what is Ejaculatory duct?

Short duct enters prostate

Empties into urethra

what is function of the urethra?

Last portion of duct system

convey urine and semen

what is the seminal glands?

yellowish fluid for sperm motility (sugars, coagulation)

Mix with sperm in duct