Ejaculation/Semen

Describe the nervous control of erection

parasympathetic causes relaxation of smooth muscles in penis allowing erectile tissue to rapidly engorge with blood. veins surrounding the erectile tissue are compressed cutting of venous drainage

describe the nervous control of ejaculation

sympathetic contracts smooth muscles of ductus deferens and remain ducts to expel semen. constrict the smooth muscle of the arteries into the penis allowing blood flow out of the penis through deep dorsal vein.

what is A

root of penis

what is B

body of penis

what is C

glans penis

what is D

navicular fossa

what is E

epididymis

what is F

ductus deferens

what is G

crus of penis

what is H

bulb of penis

what is I and how does it contribute to semen

bulbourethral (aka cowper’s) gland

lubricates and clears out the urethra prior to ejaculation

what is J

ejaculatory duct

what is K and how does it contribute to semen

seminal vesicles

• fructose to sustain ATP production

• stimulated smooth muscle contraction to push semen

• proteins and enxymes

• 70% of semen volume

what is L

dilated ampulla of ductus deference

how does the prostate contribute to semen

• citrate to sustain ATP production

• prostate specific antigen

• antimicrobial chemicals