female reproductive system
Reproductive System
Function:
Anatomy of Male Reproductive System
Major Organs
producing offspring
External Reproductive Organs
propagation of the species
penis and scrotum
!in terms of evolution
– the only reason all the other systems exist
Internal Organs:
only major system that doesn’t work continuously
! only activated at puberty
these structures form continuous tube:
Testes
epididymus vas deferens ejaculatory duct urethra in penis
unlike most other organisms on planet
! mammals only reproduce sexually humans are dieocious
! separate sexed (many animals are monoecious or hermaphrodites) in 7th week of embryonic development genes are activated that trigger differentiation of gonads
Accessory organs seminal vesicles prostate gland bulbourethral glands
1. Penis and Scrotum penis is transfer organ glans prepuce
! expanded head
! foreskin
both have modified sebaceous glands that produce waxy secretion = smegma
1
Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4
Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4
a. seminiferous tubules
penis contains erectile tissues that surrounds the urethra
(700’ of seminiferous tubules in testes)
! functions in spermatogenesis:
! fill with blood during sexual arousal
formation and maturation of sperm cells
corpus spongiosum (lower – surrounds urethra) passes along ventral side of penis and encloses urethra
2 coropora cavernosum on dorsal side
2
in cross section: seminiferous tubules appear roughly circular and contain germinal epithelium
(containing germ cells) and sustentacular
(Sertoli) cells
(upper)
Sertoli cells protect germ cells and promote their development
all contain numerous tiny blood sinuses
= lacunae
b. interstitial cells
scrotum keeps testes at cooler temperature
are scattered between the seminiferous tubules
function in hormone
Function:
Anatomy of Male Reproductive System
Major Organs
producing offspring
External Reproductive Organs
propagation of the species
penis and scrotum
!in terms of evolution
– the only reason all the other systems exist
Internal Organs:
only major system that doesn’t work continuously
! only activated at puberty
these structures form continuous tube:
Testes
epididymus vas deferens ejaculatory duct urethra in penis
unlike most other organisms on planet
! mammals only reproduce sexually humans are dieocious
! separate sexed (many animals are monoecious or hermaphrodites) in 7th week of embryonic development genes are activated that trigger differentiation of gonads
Accessory organs seminal vesicles prostate gland bulbourethral glands
1. Penis and Scrotum penis is transfer organ glans prepuce
! expanded head
! foreskin
both have modified sebaceous glands that produce waxy secretion = smegma
1
Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4
Human Anatomy & Physiology: Reproductive System; Ziser Lecture Notes, 2013.4
a. seminiferous tubules
penis contains erectile tissues that surrounds the urethra
(700’ of seminiferous tubules in testes)
! functions in spermatogenesis:
! fill with blood during sexual arousal
formation and maturation of sperm cells
corpus spongiosum (lower – surrounds urethra) passes along ventral side of penis and encloses urethra
2 coropora cavernosum on dorsal side
2
in cross section: seminiferous tubules appear roughly circular and contain germinal epithelium
(containing germ cells) and sustentacular
(Sertoli) cells
(upper)
Sertoli cells protect germ cells and promote their development
all contain numerous tiny blood sinuses
= lacunae
b. interstitial cells
scrotum keeps testes at cooler temperature
are scattered between the seminiferous tubules
function in hormone