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72 Cards in this Set
- Front
- Back
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process which the fetal head pushes down into cervix causing cervix to become thin and soft
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effacement
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period of time for development of the embryo and fetus within the uterus
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geastrulation
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failure of the posterior neural groove to close
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spina bifida
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which cells from the trophoblast give ride to the syncytiotrophoblast
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cytotrophoblast
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fluid filled space of blastula is
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blastocoel
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term referring to cells of an embryo which have the potential to develop into a complete individual
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totipotent
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approx how old is the human embryo when it reaches the 2-cell stage
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30 hours
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approx how old is the human embryo when it reaches the uterus
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3-4 days
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a term for the developing emryo or fetus is
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conceptus
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the name for an embryo when it becomes a solid ball of cells
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morula
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the process of the production of the organs and their systems is
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organogenesis
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which primary germ layer gives rise to the adrenal medulla
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ectoderm
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a fertilized oocyte is referred to as
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zygote
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failure of the anterior neural groove to close results in which condition
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anencephaly
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what structure will become part of umbilical cord and urinary bladder
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allantois
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which primary germ layer gives rise to the adrenal cortex
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mesoderm
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what will the trophoblast give rise to
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placenta
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which layer of the bilaminar blastula will produce the yolk sac
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hypoblast
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which layer of the bilaminar blastula will produce the embryo proper
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epiblast
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which primary germ layer gives rise to
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mesoderm
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spaces that become filled with maternal blood which bath the chorionic villi of embryo
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lacunae
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a stage of human development that is analogous to the gastrula state of lower animals
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embryonic disc or trilaminar embryo
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a method of collecting feral cell by sampling the parts of the placenta
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chorionic villus sampling
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the name given to the human embryo once the inner cell mass differentiates into 2 layers
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bilaminar blastula
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approx how many cells are in a human embryo
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16
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these cells from trophoblast invade the uterus to establish the placenta
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syncytiotrophoblasts
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a term referring to the fact that certain cells are multinucleated
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syncytio
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that period of the birth process in which the fetal head begins to push through the vaginal orifice
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crowning
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each cells of an embryo is referred to as
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blastomeres
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where does fertilization occur in the woman
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ampulla of the fallopian tube
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birth process is known as
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parturition
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which cells of the embryo produce hCG
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trophoblasts
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a specialized fluid filled membrane which surrounds embryo of fetus
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amnion
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how old is the human fetus when most amniocentesis are advised
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10-12 wks
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by what embryonic age does the anterior portion does the neural groove close
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day 27
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how old is the human fetus when most chorionic villus sampling is advised
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15-18 wks
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what does the inner cell mass become in a human embryo
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embryo proper
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a specialized membrane which surrounds the amnion and has villi
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chorion
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the period of the birth process in which the placenta separates from the uterus and is delivered
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placental stage
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a method of collecting fetal cells by sampling the amniotic fluid
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amniocentesis
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what stage of the bilamninar embryo gives rise to the ectoderm, mesoderm, and endoderm
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epiblast
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the name for the human conceptus from day 1 to the 8th week
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embryo
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which primary germ layer gives rise to the blood
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mesoderm
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another name for the embryonic disc stage of development
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trilaminar embryo
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which primary germ layer gives rise to the epidermis
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ectoderm
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which primary germ layer gives rise to the CNS
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ectoderm
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by what embryonic age does the anterior portion of the neural groove close
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day 25
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which part if the blastula will give rise to the embryo proper
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inner cell mass
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what lines the blastocoel making it the primary yolk sac
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mesoderm
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approx how old is the human embryo at implantation
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6 days
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aka trilaminar embryo
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embryonic disc
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which primary germ layer gives rise to the muscle
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mesoderm
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the name given to the human embryo once inner cell mass flattens and develops 3 layers
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embryonic disc or trilaminar embryo
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how old is the human embryo when it reaches the embryonic disc or trilaminar embryo stages
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15-16 days
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the process of the production of the primary germ layers is known as
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embryogenesis
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which primary germ layer gives rise to the dermis
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mesoderm
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masses of mesoderm that lie on either side of the notochord which will give rise to portions of the skeleton, skin, and muscle
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somites
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assuming a 28 day cycle when does fertilization occur
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day 14-15
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approx how old is the human embryo when it reaches the blastula stage
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4 days
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which primary germ layer gives rise to most of visceral organs
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endoderm
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name of an embryo when it becomes a hollow ball of cells
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blastula
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which part of the blastula will give rise to the placenta
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trophoblasts
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which hormone signals the maternal release of oxytocin
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cortisol
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what is the source of the hormone that signals the maternal release of oxytocin, "maternal" or "fetal"
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fetal
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that period of the birth process in which the fetal head begins to push through the vaginal orifice
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expulsion stage
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the 1st stage of birth in which the cervical opening will reach a diameter of 10 cm
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dilation stage
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approx how old is the human embryo when it reaches the morula stage
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3 days
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the name given to the outer layer of cells of a human blastula
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trophoblasts
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the period of the birth process that lied between dilation and delivery is
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expulsion stage
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a median cylindrical structure in a human embryo that will be replaced by the vertebral column
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notochord
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which primary germ layer gives rise to the posterior pituitary gland
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ectoderm
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the name for the human conceptus from the 8th week until birth
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fetus
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