Term
|
Definition
time of childbearing from mother's point of view
40 weeks |
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Term
|
Definition
time span from fertilization to birth from child's point of view
38 weeks |
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Term
|
Definition
before birth
embryo (0-2 mo)+ fetus (2mo- birth) |
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Term
|
Definition
0- 8 weeks
organogenesis
tissue differentiation |
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Term
|
Definition
9 weeks to birth
growth and differentiation
end of 3rd mo. functioning placenta |
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Term
|
Definition
| first 42 days after birth |
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Term
| stages from fertilization to implantation (5) |
|
Definition
1) fertilization- 12-24 hours
2) cleavage- 1st 30 hours
3) morula- 3-4 days
4) blastocyst- 4.5-5 days
5) implantation in uterus- 6 days |
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Term
| path of sperm through egg |
|
Definition
| corona radiata (surrounding cells) -> zona pellucida -> plasma membrane |
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Term
|
Definition
hollow ball of cells (after cleavage and morula formation)
enters uterine cavity on day 5
cells differentiate into inner cell mass and tropoblast
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Term
|
Definition
can make ANY cell, most potent
ex: zygote |
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Term
|
Definition
3 germ layers: endoderm, mesoderm, ectoderm
ex: inner cell mass
after further specialization = multipotent |
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Term
|
Definition
adult stem cells
ex: specific blood type |
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Term
|
Definition
implantation site in endometrium
mother's contribution to the placenta |
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Term
|
Definition
| development of 3 primary germ layers |
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Term
| what does the endoderm form? |
|
Definition
epithelia of GI, urogenital, respiratory
all inner linings |
|
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Term
| what does the mesoderm form? |
|
Definition
| muscle, bone, cartilage, blood, CTs |
|
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Term
| what does the ectoderm form? |
|
Definition
| epidermis of skin and nervous system |
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Term
|
Definition
development of brain, spine, spinal cord, nerves
day 17-22 |
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Term
|
Definition
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Term
|
Definition
| failure of closing of neural tube |
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Term
|
Definition
early blood formation
gonadal stem cells
from endoderm |
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Term
|
Definition
from ectoderm
surrounds embryo with fluid: shock absorber, regulates body temp, prevents adhesions
filtrates mother's blood |
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Term
|
Definition
embryonic placenta
from trophoblasts and mesoderm
exchange of nutrients |
|
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Term
|
Definition
amnionic membrane + chorionic membrane
3rd month |
|
|
Term
| arteries and veins of umbilical cord |
|
Definition
2 arteries AWAY from fetus
1 vein TOWARDS fetus |
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|
Term
| limiting factor for viability |
|
Definition
| maturation of respiratory system |
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