Fancy Female Reproductive System OVARIES Main female sex organ Oogenesis: Eggs are made here! Only...

Fancy Female Fancy Female Reproductive Reproductive

SystemSystem

OVARIESOVARIES• Main female sex organ

• Oogenesis: Eggs are made here! Only 23 chromosomes in these special cells

• Production of hormones

Ovaries (cont.)Ovaries (cont.)A. Estrogen

• Enlargement of reproductive organs

• Breast development• Increased fat deposits• Widening of pelvis• Vascularization of the

skin• Onset of menstrual

cycle

Ovaries (cont.)Ovaries (cont.)

• B. Progesterone (pregnancy)

• Vascularization of uterus

• Maintains the pregnancy

• Prepares breast for milk production

Front View of Female Front View of Female Reproductive SystemReproductive System

Side View of Female Side View of Female Reproductive SystemReproductive System

FIMBRIAEFIMBRIAE

• Funnels pull egg into the fallopian tube

• Doesn’t touch the ovary

FALLOPIAN TUBEFALLOPIAN TUBE

• Leads the egg to the uterus which takes five days

• EGG and SPERM meet here !!

UTERUSUTERUS• Size and shape of pear (with increasing power)• Double lining:

• Myometrium: muscle• Endometrium: blood

• Receives, retains, and nourishes the fertilized egg (zygote)

CERVIXCERVIX

• Opening between uterus and vagina

• Pap Smears

VAGINAVAGINA

• Birth canal (8-10 cm long)• Behind the urethra and in front of the rectum• Receives erect penis, sperm released• Acidic environment protects females from

invasive bacteria and/or sperm

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VULVAVULVAA. Labia majora & minora

Folds of skin around urethral and vaginal openings

Keeps yucky stuff out (like bacteria)

B. Clitoris

Erectile tissue, engorges with blood, glands for lubrication

Equivalent to the male penis

BREASTBREAST

• Secretion of milk

Moody Moody Menstrual Menstrual

CycleCycle

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Days 1-5: Menses (period)Days 1-5: Menses (period)

• Endometrium lining sloughs off causing bleeding through vagina (1/4-1/2 cup)

Days 6-14Days 6-14

• Follicle-stimulating hormone (FSH) stimulates a follicle in the ovary to mature into an egg

• Estrogen (made by ovary) rebuilds the endometrium and increases until…..

Day 14: OVULATIONDay 14: OVULATION

• Estrogen causes the release of Leutenizing hormone (LH)

• LH causes the rupture of a follicle, the egg is released (ovulation)

Days 15-28Days 15-28

• The scar (where the follicle ruptured) becomes the corpus luteum and releases progesterone

• Egg lives 24 hours (1 day)• Sperm lives about 48-72 hours• Sperm needs about 1-2 hours to get to the

egg

BOTTOM LINEBOTTOM LINE

• Intercourse no more than 72 hours before ovulation

• No later than 24 hours after ovulation

If no fertilization?If no fertilization?

• Hormone levels go down

• Cycle returns to Day 1

If fertilization….If fertilization….

• Embryo secretes hormone that keeps ovary producing progesterone

• Uterine lining (endometrium) doesn’t break down, develops into placenta

Tubal Ligation…Tubal Ligation…

• Fallopian tube is cut & tied, cauterized or clipped

• The egg can no longer travel to the uterus

• The egg is reabsorbed by the body each month