figure 46.10a (rectum) cervix vagina major vestibular (bartholin’s) gland vaginal opening oviduct...
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Reproduction
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Figure 46.10a
(Rectum)CervixVagina
Major vestibular(Bartholin’s) gland
Vaginal opening
Oviduct
OvaryUterus
(Urinary bladder)
(Pubic bone)
Urethra
BodyGlansPrepuce
Clitoris
Labia minoraLabia majora
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Figure 46.10b
Ovaries Oviduct
Follicles
Corpus luteumUterine wallEndometrium
Vagina
Uterus
Cervix
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Figure 46.12bb
2n
2n
nn
n
n
Primordial germ cellMitotic divisions
Mitotic divisions
Oogonium
In embryo
Primary oocyte(present at birth), arrestedin prophase of meiosis I
Completion of meiosis Iand onset of meiosis II
Secondary oocyte,arrested at metaphase ofmeiosis II
Firstpolarbody
Ovulation, sperm entry
Completion of meiosis IISecondpolarbody
Fertilized egg
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Figure 46.13 Control by hypothalamus(a)
Hypothalamus
GnRH
Anterior pituitary
FSH LH
Inhibited by combination ofestradiol and progesterone
Stimulated by high levelsof estradiol
Inhibited by low levels ofestradiol
109
87
65
4
3
2
1
(b) Pituitary gonadotropinsin blood
LH
FSH
FSH and LH stimulatefollicle to grow
6
LH surge triggers ovulation
Ovarian cycle
Growing follicle Maturing follicle
Corpusluteum
Degeneratingcorpus luteum
Follicular phase Ovulation Luteal phase
Estradiol secretedby growing follicle inincreasing amounts
(c)
Progesterone andestradiol secretedby corpus luteum
(d) Ovarian hormonesin blood
Estradiol
Peak causes LH surge(see )
Progesterone
Progesterone and estra-diol promote thickeningof endometrium
Estradiol levelvery low
(e) Uterine (menstrual) cycle
Endometrium
Menstrual flow phase Proliferative phase Secretory phase
Day
s
28252015141050
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Figure 46.13a
Control by hypothalamus(a)
Hypothalamus
GnRH
Anterior pituitary
FSH LH
Inhibited by combination ofestradiol and progesteroneStimulated by high levelsof estradiol
Inhibited by low levels ofestradiol
2
1
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Figure 46.13b
(b) Pituitary gonadotropinsin blood
LH
FSH
FSH and LH stimulatefollicle to grow
LH surge triggers ovulation
Ovarian cycle
Growing follicle Maturing follicle
Corpusluteum
Degeneratingcorpus luteum
Follicular phase Ovulation Luteal phase
(c)
28252015141050Day
s
3
6
7 8
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Estradiol secretedby growing follicle inincreasing amounts
Progesterone andestradiol secretedby corpus luteum
(d) Ovarian hormonesin blood
Estradiol
Peak causes LH surge(see )
Progesterone
Progesterone and estra-diol promote thickeningof endometrium
Estradiol levelvery low
(e)
Uterine (menstrual) cycle
Endometrium
Menstrual flow phase Proliferative phase Secretory phase
Da
ys
28252015141050
4
5 6
910
(e)
Figure 46.13c
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Figure 46.11b
Seminal vesicle
(Rectum)Vas deferens
Ejaculatory ductProstate glandBulbourethral gland Vas deferens
EpididymisTestisScrotum
(Urinary bladder)
(Urinary duct)
(Pubic bone)
Erectiletissue
Urethra
Glans
Prepuce
Penis
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Epididymis Seminiferous tubule
Testis
Cross section ofseminiferous tubule
Spermato-gonium
Primary spermatocyte
Spermatids (two stages)
Secondary spermatocyte
Sperm cell
Sertoli cellnucleus
Lumen ofseminiferous tubule
Figure 46.12aa
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Primordial germ cell in embryoMitotic divisions
Spermatogonial stem cell
Spermatogonium
Mitotic divisions
Mitotic divisions
Primary spermatocyte
Meiosis I
Meiosis II
Secondary spermatocyte
Earlyspermatid
Sperm cell
Differentiation(Sertoli cellsprovide nutrients)
2n
2n
2n
n n
n n n n
n n n n
Figure 46.12ab
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Figure 46.12ac
Plasmamembrane
Tail
Neck
Midpiece Head
Mitochondria
NucleusAcrosome
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Hypothalamus
GnRH
Anterior pituitary
FSH LH
Sertoli cells Leydig cells
Inhibin Spermatogenesis Testosterone
Testis
Neg
ativ
e fe
edb
ack
Neg
ativ
e fe
edb
ack
Figure 46.14
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Figure 46.11a
Seminalvesicle(behindbladder)
Urethra
Scrotum
(Urinary bladder)
Prostate gland
Bulbourethral gland
Erectile tissue of penis
Vas deferensEpididymisTestis
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5
4
1
2
3 Cleavage
Fertilization
Ovary
Ovulation
Uterus
Cleavage continues
Implantation
Endometrium(a) From ovulation to implantation
(b) Implantation of blastocyst
Endometrium
Cavity
Inner cellmass
Blastocyst Trophoblast
Figure 46.15
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Figure 47.3-1
Basal body(centriole)
Spermhead
Acrosome
Jelly coat
Sperm-bindingreceptors
Vitelline layer
Egg plasma membrane
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Figure 47.3-2
Basal body(centriole)
Spermhead
Acrosome
Jelly coat
Sperm-bindingreceptors
Hydrolytic enzymesVitelline layer
Egg plasma membrane
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Figure 47.3-3
Basal body(centriole)
Spermnucleus
Spermhead
Acrosome
Jelly coat
Sperm-bindingreceptors
Hydrolytic enzymesVitelline layer
Egg plasma membrane
Actinfilament
Acrosomalprocess
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Figure 47.3-4
Basal body(centriole)
Spermplasmamembrane
Spermnucleus
Spermhead
Acrosome
Jelly coat
Sperm-bindingreceptors
Fusedplasmamembranes
Hydrolytic enzymesVitelline layer
Egg plasma membrane
Actinfilament
Acrosomalprocess
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Figure 47.3-5
Basal body(centriole)
Spermplasmamembrane
Spermnucleus
Spermhead
Acrosome
Jelly coat
Sperm-bindingreceptors
Fertilizationenvelope
Corticalgranule
Fusedplasmamembranes
Hydrolytic enzymesVitelline layer
Egg plasma membrane
Perivitellinespace
EGG CYTOPLASM
Actinfilament
Acrosomalprocess
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5
4
1
2
3 Cleavage
Fertilization
Ovary
Ovulation
Uterus
Cleavage continues
Implantation
Endometrium(a) From ovulation to implantation
(b) Implantation of blastocyst
Endometrium
Cavity
Inner cellmass
Blastocyst Trophoblast
Figure 46.15
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Figure 47.6
(a) Fertilized egg (b) Four-cell stage (c) Early blastula (d) Later blastula
50 m
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Figure 46.18
Estradiol
from ovaries
Activates oxytocinreceptors on uterus
Oxytocin
from fetusand mother’s posterior pituitary
Prostaglandins
Po
siti
ve f
eed
bac
k
Stimulates uterusto contract
Stimulatesplacenta to make
Stimulate morecontractions
of uterus