animal reproduction. advantage of sexual reproduction: advantage of asexual reproduction:
TRANSCRIPT
Animal Reproduction
Animal Reproduction
Advantage of sexual reproduction:
Advantage of asexual reproduction:
Animal Reproduction
Advantage of sexual reproduction:
diversity
Advantage of asexual reproduction:
efficiency
Anatomy:
testes
seminiferous tubules
epididymis
vas deferens
seminal vesicles
prostate gland
bulbourethral glands
semen
glans
prepuce (foreskin)
follicle
corpus luteum
oviduct (fallopian tube)
uterus
endometrium
cervix
hymen
labia minora & majora
clitoris
Bartholin’s glands
Gametogenesis:
•Spermatogonia become primary spermatocytes
•Meiosis produces four sperm cells
•Maturation in the epididymis takes 65-75 days
•Three million sperm manufactured each day.
•Oogonia become primary oocytes, present at birth, arrested in prophase I
•Each month, one secondary oocyte is released, arrested at Metaphase II
•Entry of sperm triggers completion of meiosis II.
Menstrual Cycle
Menstrual Cycle
hypothalamus
pituitaryuterus
menstruation
follicle
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
follicle
GnRH
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
follicle
GnRH
FSH & LH
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH & LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH
& LH
estrogen
estrogen
POSITIVE FEEDBACK
hypothalamus
pituitaryuterus
thickens
follicle
GnRH
FSH
& LH
estrogen
estrogen
Ovulation!
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
follicle
GnRH
FSH
& LH
estrogen
estrogen
corpus luteum
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
follicle
GnRH
FSH
& LH
estrogen
estrogen
corpus luteum
ovum
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
develops endometrium
follicle
GnRH
FSH
& LH
estrogen & progesterone
estrogen & progesterone
corpus luteum
ovum
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
develops endometrium
follicle
GnRH
FSH
& LH
estrogen & progesterone
estrogen & progesterone
corpus luteum
ovum
Stop!
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
develops endometrium
follicle
GnRH
FSH
& LH
estrogen & progesterone
estrogen & progesterone
corpus luteum
ovum
Stop!
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
develops endometrium
follicle
GnRH
FSH
& LH
estrogen & progesterone
estrogen & progesterone
corpus luteum
ovum
Stop!
NEGATIVE FEEDBACK
hypothalamus
pituitaryuterus
menstruation
follicle
GnRH
FSH
& LH
estrogen & progesterone
estrogen & progesterone
corpus luteum
ovum
BACK TO THE BEGINNING
hypothalamus
pituitaryuterus
menstruation
follicle
GnRH
Reproductive Technologies
vasectomy
condom
• Nonoxol-9
• proper use
• storage
• mishaps
penile implants
Viagra
oral contraceptives
progesterone-only
Norplant
Depo-Provera
tubal ligation
diaphragm
MAP
IUD
RU486
Reproductive Technologies