Transcript Reproductive System

Reproductive System
Male Reproductive System
1. Testis: sperm produced
within seminiferous tubules
The testis are kept at ideal
temperature for sperm
development within the
scrotum.
2. Epididymis: storage site
where sperm mature
3. Move into a tube, vas
deferens, before entering
the urethra.
Female Reproductive System
Eggs released by the
ovary travel through the
fluid-filled fallopian
tubes by microscopic
cilia to the muscular
uterus. The lining of the
uterus is prepared to
receive a fertilized egg.
The Menstrual Cycle
Ovulation:
Follicular
Menstruation:
Phase:
Luteal
Phase:
If the egg isreacts
not to low
Hypothalamus
Cells
of
the
follicle
High
levelsthe
of corpus
estrogen
fertilized,
estrogen
levels,
causing
the
transform
into
the
corpus
causes
the
pituitary
gland
luteum disintegrates
anterior
pituitary
to release
which
to luteum
release
large releases
amounts
and estrogen
&
FSH & and
LH
estrogen
of FSH & levels
LH
progesterone
progesterone
fall triggering
menstruation
Follicles begin to develop
Follicle
ruptures,
cellsisaround
eggit will
If the–egg
fertilized,
releasing
the egg
produce
estrogen
which
implant
in the
uterine
wall and
causes
the
lining
of
the
release HCG which maintains
uterus
to thicken
the
corpus
luteum.
Menstrual Cycle – Example of
Feedback Regulation
High levels of estrogen
cause an increase in
secretion of FSH & LH:
positive feedback (#4)
Progesterone results in
the inhibition of FSH &
LH secretion: negative
feedback (#8)
Diseases of the Reproductive
System
• Can be caused by a variety of pathogens including
bacteria, viruses, protists and fungi.
• Example of Bacterial disease: Chlamydia (Chlamydia
trachomosis
Chlamydia facts:
Most common STD
Men – no symptoms
Women – can lead to
infertility due to scarring
of fallopian tubes
Cervical cells infected with
Chlamydia
Diseases of the Reproductive
System
• Example of a viral reproductive disease: Human
papillomavirus (HPV)
HPV Facts:
Over 100 types of this wartcausing virus
Over 30 are linked with cervical
cancer
According to the CDC, over
50% of men & women will have
HPV at some time in their lives
Cervical cells infected with HPV