Chapter 6: Conception and Fetal Development(100%
Guaranteed)
3 Stages of Intrauterine Development correct answers-Ovum or pre-embryonic (germinal layers)
-Embryonic
-Fetal.
Primary Germ Layers correct answers-Ectoderm
-Mesoderm
-Endoderm
Embryonic Stage correct answers-This stage is most vulnerable to malformation
Fetal Stage correct answers-By end of 8th week, all organ systems and external structures are
present and embryo is unmistakably human
Chorion correct answers-At implantation, 2 fetal membranes begin to form
-Becomes covering of fetal side of placenta and contains major umbilical blood vessels that
branch out over surface of placenta.
Amnion and Amniotic Cavity correct answers-Gets fluid by diffusion from maternal blood.
-Fluid from fetal respiratory and GI tracts.
-Fluid increases weekly, and 700-1000 mL of transparent liquid is normally present at term.
-Fetus swallows fluid in week 11
-Fetus urinates into fluid, increasing volume.
Amniotic Fluid Functions correct answers-Temperature
-Oral fluid -Repository for waste
-Assist in maintenance of fluid and electrolyte homeostasis.
-Cushion -Freedom of movement
-Barrier to infection
Oligohydramnios correct answers-Less than 300 mL
-Associated with fetal renal abnormalities
Hydramnios/Polyhydramnios correct answers-More than 2000 mL
-Associated with GI malformations
Umbilical Cord correct answers-Supplies embryo with maternal nutrients and oxygen
-Wharton's jelly
Placenta correct answers-Maternal-placental-embryonic circulation is in place by day 17.
-Supplies oxygen and excreting CO2 to maternal blood stream through umbilical vein
-Metabolic function and waste
-Nutrient storage
Guaranteed)
3 Stages of Intrauterine Development correct answers-Ovum or pre-embryonic (germinal layers)
-Embryonic
-Fetal.
Primary Germ Layers correct answers-Ectoderm
-Mesoderm
-Endoderm
Embryonic Stage correct answers-This stage is most vulnerable to malformation
Fetal Stage correct answers-By end of 8th week, all organ systems and external structures are
present and embryo is unmistakably human
Chorion correct answers-At implantation, 2 fetal membranes begin to form
-Becomes covering of fetal side of placenta and contains major umbilical blood vessels that
branch out over surface of placenta.
Amnion and Amniotic Cavity correct answers-Gets fluid by diffusion from maternal blood.
-Fluid from fetal respiratory and GI tracts.
-Fluid increases weekly, and 700-1000 mL of transparent liquid is normally present at term.
-Fetus swallows fluid in week 11
-Fetus urinates into fluid, increasing volume.
Amniotic Fluid Functions correct answers-Temperature
-Oral fluid -Repository for waste
-Assist in maintenance of fluid and electrolyte homeostasis.
-Cushion -Freedom of movement
-Barrier to infection
Oligohydramnios correct answers-Less than 300 mL
-Associated with fetal renal abnormalities
Hydramnios/Polyhydramnios correct answers-More than 2000 mL
-Associated with GI malformations
Umbilical Cord correct answers-Supplies embryo with maternal nutrients and oxygen
-Wharton's jelly
Placenta correct answers-Maternal-placental-embryonic circulation is in place by day 17.
-Supplies oxygen and excreting CO2 to maternal blood stream through umbilical vein
-Metabolic function and waste
-Nutrient storage
