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[DOC File]What are the critical periods in prenatal development
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From Gametes to Birth Timeline . Goals: 30–B3.1k. trace the . processes of fertilization, implantation and extra-embryonic membrane formation, (placenta, amnion, chorion, allantois, followed by embryonic and fetal development, parturition and lactation)and describe the
3 stages of prenatal development

[DOC File]Reproductive System, Menstrual Cycle
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inner cell mass = embryonic stem cells. multipotent can become a few different cells. neural stem cells. hematopoietic stem cells. reproductive cloning create entire adult organism Dolly. therapeutic cloning create specific tissues. fetal development. weeks 9 – 38. cell specialization detailed tissue organ development. growth. hormones
five stages of embryonic development

[DOCX File]Chapter 29
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Teratogens are especially damaging in the embryonic stage because it is a critical period in prenatal development. Later, during the fetal stage, the environment provided by the mother affects the baby’s size, behaviour, intelligence and health, rather than the formation of organs and limbs (Bernstein and Nash, 1999, p. 333).
stages of embryonic development

[DOC File]CHAPTERS 27, 4 PREGNANCY and DEVELOPMENT
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Stages of Pregnancy and Development. Fertilization. Embryonic development. Fetal development. Parturition (childbirth) Fertilization. The oocyte is viable for 12 to 24 hours after ovulation. Sperm are viable for 12 to 48 hours after ejaculation. Sperm cells must make their way to the uterine tube for fertilization to be possible. Mechanisms of ...
human embryology and fetal development

Stages of Prenatal Development
Differentiate between embryological development and fetal development. EMBRYONIC PERIOD. First Week of Development. Describe the process of fertilization, including capacitation and how the sperm penetrates the three layers surrounding the secondary oocyte. Describe the two processes that stop penetration of the egg by more than one sperm.
development of a human embryo

[DOC File]Chapter 28: Pregnancy and Human Development
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stages. zygote 1st cell . pre-embryo 1st 2 weeks. embryo week 3 – 8 (week 1 – 8) fetus week 9 - birth. pre-embryonic growth. cleavage. mitotic divisions. morula 16 + cells in a ball ~ day 3 100 cells ~ day 4-5 . enter uterus ~ day 4 ... fetal development. weeks 9 – …
stages of fetal development

[DOC File]Chapter 28 Pregnancy and Development
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Fetal Development. Begins at start of ninth week. Continues until birth. 29-1 Development. Prenatal Development . Embryonic and fetal development stages. Postnatal. Development. Commences at birth. Continues to . maturity, the state of full development or completed growth. 29-1 Development. Inheritance
embryonic period chart

Embryonic and fetal development stages