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29 Cards in this Set
- Front
- Back
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The fetal heart begins to beat at ____ weeks?
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4 Weeks
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All body organs are formed at ____ weeks?
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8 Weeks
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The Sex of the Baby can be determined at ____ weeks?
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16 Weeks
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The eyes open and close at ____weeks?
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28 Weeks.
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38 weeks the baby receives what from the mother?
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Antibodies
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Name the three stages of fetal development
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Preembryonic, Embryonic, Fetal
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Fetal Stage of Development is focused on
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Structure & function
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Embryonic Stage of Development is focused on
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4 wks heart beat, circulation at 6wks.
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Pre-embryonic Stage is 1-15 days of human life
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“fertizilation”
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Humans have how many chromosomes and how many pairs
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46, 23 pairs
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Mitosis
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is the process by which additional somatic cells are formed. It provides growth and development of organisms and replacement of body cells.
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Meiosis
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is the process by which gametes (ova & sperm)are formed.
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The ovum is fertile for about how many hours ____ to ____?
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12 to 24
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Ampulla (outer third of fallopian tube) is were what takes place
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Fertilization
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Zygote rapid mitotic division is called
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Cleavage
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Implantation occurs in which part of the uterine wall
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the Posterior
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After implantation the endometrium is called the
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Decidua
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List the three primary germ layers
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Ectoderm, Endoderm, Mesoderm.
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The Ectoderm is responsible for development of the
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skin, nails & hair
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The Endoderm is responsible for the development of the
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internal organs (intestines)
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Mesoderm is responsible for the development of
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connective tissue, bone marrow, muscles, blood, tissue, epithelial tissue.
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Amnion is a
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thin protective membrane that contains the amniotic fluid and the embryo.
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Chorion is a
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thick membrane, that develops from the trophoblast and encloses the amnion, embryo & yolk sac.
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What regulates the embryo’s temp
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Amniotic Fluid
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This jelly prevents compression of the umbilical cord in utero
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What is Wharton’s Jelly
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What is the function of the two umbilical arteries
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to carry deoxygentated blood from the fetus to the placenta.
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What is the function of the one umbilical vein
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to caryy oxygentated blood from the placenta to the fetus.
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List the functions of the placenta
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Respiratory organ, organ of excretion, exchange of nutrients, exchange metabolic, immunologic function & endocrine.
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During the 1st 8 weeks of development a fetus is particularly vulnerable to this related to organ development
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Teratogenesis.
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