The Human Reproductive System Summary

MALE REPRODUCTIVE SYSTEM
Parts : -

Testes
-
Tubules (transport for sperm)
Accessory glands
-




-

Penis

,Testes "

2 =
testis
testes



Primary male Protects
→
sex
organ >
against physical injury
"

temp [34 -35 ]
"

suspended between legs regulates
'

→
in scrotum sac →
acts as a thermostat =




0
Optimal sperm production =
temp 2- 3°C lower than body temp .




*
Internally → testis ÷ into lobules →
each contain convoluted seminiferous tubules → lined with germinal epithelium .




*
Spermatogenesis (occurs in seminiferous tubules ) →
germinal epithelium
÷
(meiosis) =
sperm cells (male gametes)

Some epithelium develope into Sertoli cells ( long /columnar) provide food/nutrients for
cells developing cells
→
9




Semi tubules surrounded by connective tissue → contains interstitial cells
Leydig cells ( =

produces testosterone)
.
-




function

* produce i. release sperm
* Produces male sex hormone testosterone characteristics
: :
secondary

, Tubules
Epididymis (✗ 2)


seminiferous tubules join to form epididymis
→


→
situated at back of tester
>
lined with mucous membrane


functions
→ stores sperm where sperm matures
→
Mucous membrane =
secretes substance : moves sperm (with peristaltic movement)


Vas deferens sperm duct

Passes through abdominal opens into urethra
>
cavity +


just before urethra forms swelling ampulla
i. → =
a




Functions
→
Transports sperm =
peristaltic movement



Ejaculatory duct


Ampulla leads
ejaculatory duct
→
to


Function
→
Smooth muscle fibres in duct wall contract :
forcing semen along urethra
* Release of sperm =
ejaculation

Urethra
→ 2
ejaculatory ducts join urethra :
open to exterior


Function
→
Transports urine i. sperm
↳ never time !
pass @ same