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Egg is ____________ than the sperm
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- in order of egg pathway
Structures - in order of egg pathway Ovary - EGG matures in a follicle produces estrogen
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Fallopian tubes 1. ____________ for the egg to the uterus
2. ____________ (where sparky and olive meet)
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Uterus Sections: Fundus Description: ___________________________
Function: ___________________________ Fundus - ___________________________ endometrium - _______________________ Cervix - ____________________________ Sections: Fundus
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Vagina Functions: 1. 2. 3.
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Labia Majora Labia Minora Clitoris External Structures:
Two sets of folds which protect the vaginal opening Labia Majora Labia Minora Clitoris ____________________________________________________________ erectile tissue vulva Two sets of folds which protect the vaginal opening
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Egg Pathway (fertilization) _________(ovaries) _______________ Uterus
(Attaches to uterine wall as zygote) __________ (Birth Canal)
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Uterine Cycle
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maintains thickness. of uterine lining (endometrium)
Female Hormones -pituitary From the Brain FSH ___________________________ __________________ LH ________________________ ovulation - tells ovaries to release egg, produce progesterone and stimulates follicle to become corpus luteum From the ovaries: _____________ thickening of the uterine lining female secondary sex characteristics (auxiliary and pubic hair, wide hips, breasts development) _______________ maintains thickness. of uterine lining (endometrium) growth of corpus luteum
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follicle in the ovary grows
Uterine Cycle Duration: days 1-5 Menstruation: 6-14 Follicular phase 14-15 Ovulation Luteal phase lining of the uterus and blood are discharged follicle in the ovary grows egg released from ovary
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Follicular Phase Uterine Cycle / Menstrual Cycle 28 days
immature egg stimulated by ________ to complete its first meiotic division follicle which surround the maturing egg releases _____________ which causes mitotic divisions of cells in the uterine lining causing the lining to thicken elevated estrogen in turn tells the pituitary gland to release LH, duration: 7 days: Day 7- 14
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Ovulation - an elevation in LH causes the follicle to rupture and _________________ - duration: ___________ (day 14 of the cycle)
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Luteal Phase: The ruptured follicle grows larger and becomes a
structure called the ______________(yellow body) The corpus luteum begins to secrete _____________ and ________________ which stimulates continued thickening of the uterine lining If no fertilization - corpus luteum stops secreting estrogen and progesterone and _____________________starts Duration 14 days
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process: Fertilization union of sperm and egg
If ovulation occurs anytime from ________________________after _____________________ fertilization may result in the fallopian tubes process: 1.The enzymes in the acrosome of several sperm break down the egg's _____________________ 2. the head of __________________ cell fuses with the egg's cell membrane 3.Only the _____________ and _______________ enter the cytoplasm of the egg 4. egg cell membrane changes to prevent other sperm from entering
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8 weeks Events of Pregnancy - most dramatic changes
Implantation: the zygote (fertilized egg) forms a ball of cells and travels down the fallopian tubes to the uterus and burrows into the uterine wall. Events of Pregnancy First Trimester - ________________________ - most dramatic changes - the blastocyst (ball of cells) begins to differentiate and is called an ___________________ - three primary germ layers form: __________________ ______________ _______________ all body tissues will form from these layers. - placenta grows -brain, spinal cord develop -heart begins ___________________ - by 5 weeks - human features such as _______ & ________ form - week 8 on till birth referred to as ________________ 8 weeks
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Second Trimester - _____________
-fetal heartbeat is audible -___________begins to form -___________ cycles -swallowing -kicks feet -eyes open -_________________ in length
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Third Trimester - _____________________
-Fetus grows quickly -can see light and darkness -can react to ______________ -deveops fat deposits under skin
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Embryonic Membranes amniotic sac - contains fluid which cushions embryo from shock, mechanical injury and keeps it moist chorion - forms small fingerlike projections called chrionic villi which will develop into the placenta and umbilical cord which carry food and oxygen to fetus and wastes away
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270 days after fertilization
Birth 270 days after fertilization 1. ______________ from fetal membranes initiate childbirth 2. amniotic sac ________________ 3. contractions of the uterus get stronger contractions eventually push the baby out through the __________ and though the ______ 4. __________________and ____________ are expelled about 30 minutes after birth ("after birth")
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