May 24, 2010 Ms. Simon Regents Biology. Do Now: 1) Pass forward Regents Questions 2) Compare the...
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Transcript of May 24, 2010 Ms. Simon Regents Biology. Do Now: 1) Pass forward Regents Questions 2) Compare the...
![Page 1: May 24, 2010 Ms. Simon Regents Biology. Do Now: 1) Pass forward Regents Questions 2) Compare the female reproductive systems of birds, amphibians and.](https://reader036.fdocuments.in/reader036/viewer/2022081521/5a4d1ad97f8b9ab059973fcd/html5/thumbnails/1.jpg)
May 24, 2010Ms. Simon
Regents Biology
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Do Now: 1) Pass forward Regents Questions2) Compare the female reproductive systems of birds, amphibians and mammals.
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Reproductive SystemsAmphibians Birds MammalsExternal Fertilization Internal Fertilization Internal Fertilization
Most eggs More Eggs Least eggs
External Development of Zygote Internal Development of Zygote
Reproductive and Excretory Systems are Connected Reproductive and ExcretorySeparate
Cloaca Cloaca Vagina
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Reproductive Systems
AmphibiansBirds MammalsExternal Development of Zygote (Both) Internal Development of Zygote
External Fertilization Internal Fertilization Internal Fertilization
Reproductive + Excretory Reproductive + Reproductive +
Systems Connected Excretory= Separate Excretory= separate
Less Parental Care More Parental Care More Parental Care
Most Eggs More Eggs Least eggs
Cloaca Cloaca Vagina
![Page 5: May 24, 2010 Ms. Simon Regents Biology. Do Now: 1) Pass forward Regents Questions 2) Compare the female reproductive systems of birds, amphibians and.](https://reader036.fdocuments.in/reader036/viewer/2022081521/5a4d1ad97f8b9ab059973fcd/html5/thumbnails/5.jpg)
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AIM: How is the menstrual cycle regulated?
![Page 7: May 24, 2010 Ms. Simon Regents Biology. Do Now: 1) Pass forward Regents Questions 2) Compare the female reproductive systems of birds, amphibians and.](https://reader036.fdocuments.in/reader036/viewer/2022081521/5a4d1ad97f8b9ab059973fcd/html5/thumbnails/7.jpg)
Menstrual Cycle
Function: 1) Prepare the egg for fertilization2) Prepares the uterus to support a fetus
Age: 11-13 up until the mid-50’s (menopause)
Length: Approximately 28 days
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During the menstrual cycle, the endometrium (uterine lining) thickensand number of blood vessels increases
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Endometrium must:
• Support the fetus• Provide nutrition• Remove Waste
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At Day 28, the endometrial wall begins to break down and is shedded from the body in the process of menstruation
At Day 14, an egg is released through ovulation
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The menstrual cycle is controlled by the endocrine system
Anterior Pituitary FSH ovary estrogen LH ovary ovulation
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Four phases of the menstrual cycle
1) Follicle Phase- low levels of estrogen, stimulate GnRH is released, increase LH + FSH- uterine wall begins to thicken- follicles mature, estrogen levels rise
2) Ovulation- release of an egg
3) Luteal Phase- progesterone, and estrogen are released
4) Menstruation- shedding of the uterine wall
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Corpus Luteum