Term
| another word for fertilization |
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Definition
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Term
| name of the embryo in the uterus |
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Definition
| exchange of nutrients and waste products Oz/C02 between mother and baby |
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Definition
| finger-like projections, part of the zygote |
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Definition
| portion of the chorion that develops the chorionic villi |
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Term
| placenta is formed from which 2 parts |
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Definition
| chorion frondosum and decidua basalis |
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Term
| Decidua Basalis of endometrium |
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Definition
| contain mothers blood vessels |
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Term
| two main events of 2nd week of development |
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Definition
| development of chorionic villi and differentiation of the inner cell mass into 3 types of germinal tissues |
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Term
| 3 types of germinal tissues |
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Definition
| ectoderm, mesoderm, and endoderm |
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Term
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Definition
| development of CNS0 brain and spinal cord |
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Term
| three main events in 3rd week of development |
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Definition
development of neural tube
differentiation of 3 germinal tissues
secretion of CG hormone by chorionic villi into maternal circulation |
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Term
| Ectoderm differentiates into what? |
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Definition
| epidermis and central nervous system |
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Term
| Mesoderm develops into what? |
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Definition
| paraxial mesoderm, intermediate mesoderm, and lateral plate mesoderm |
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Term
| Chorionic Gonadotropin hormone (CG) |
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Definition
secreted by the chorionic villi into the maternal circulation
stimulates the mother's ovaries to secrete progesterone and estrogen throughout pregnancy |
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Term
| what week is CG detectable int he blood stream? |
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Definition
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Term
| Progesterone does what for pregnancy? |
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Definition
| stimulates vascularization- blood vessels grow to nourish baby |
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Term
| most critical period of human embryonic development |
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Definition
| 4th to 8th week- if anything goes wrong baby is born w/ serious deformities |
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Term
| 5 events of 4th week of development |
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Definition
development of flat embryonic disk into a tubular-shaped embryo -constriction between gut and yolk sac -segmentation of the paraxial mesoderm into somite
-development of brain into 3 regions: forebrain, midbrain, and hindbrain
-development of heart beat
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Term
| week when the paraxial mesoderm segments into 43 pairs of somites |
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Definition
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Term
| week that the brain develops into 3 regions: forebrain, midbrain, and hindbrain |
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Definition
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Term
| week of development of a beating heart |
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Definition
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Term
| purpose of umbilical cord |
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Definition
| blood vessels of UC carry nutrients through the placenta from mother to baby |
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Term
| spinal cord develops from which germinal tissue? |
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Definition
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Term
| Parietal peritoneum develops from which subtype of which germinal tissue? |
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Definition
| somatic mesoderm of the lateral plate mesoderm |
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Definition
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| Tropoblast layer of blastocyst |
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Definition
| develops into the chorion |
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Term
| inner cell mass of the blastocyst |
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Definition
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Term
| when does the blastocyst implant into the endometrial lining of the uterus? |
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Definition
| by the end of the 1st week |
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Term
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Definition
| 1st-3rd weeks of pregnancy |
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Term
| The alimentary canal develops from which germinal tissue? |
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Definition
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Term
| when does the central nervous system begin to develop? |
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Definition
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Term
| which week does the flat embryonic disk develop into a tubular shaped embryo? |
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Definition
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Term
| The Axial skeleton develops from the subtype of which germinal tissue? |
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Definition
| Paraxial mesoderm then the axial skeleton |
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Term
| The skeletal muscles develop from which subtype of which germinal tissue? |
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Definition
| myotome of the paraxial mesoderm |
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Term
| the urogenital system develops from which germinal tissue? |
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Definition
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| The visceral peritoneum develops from which subtype of which germinal tissue? |
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Definition
| splanchnic mesoderm of the lateral plate mesoderm |
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Term
| what important event occurs at the 5th week of development? |
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Definition
| further differentiation of the mesodermal tissues (paraxial, intermediate, and lateral plate mesoderm) |
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Term
| The lateral plate mesoderm differentiates into what during the 5th week of development? |
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Definition
| somatic mesoderm and splanchnic mesoderm |
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| The paraxial mesoderm differentiates into what in the 5th week of development? |
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Definition
| the dermatome, myotome, and sclerotome |
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Term
| What subtype of which germinal tissue does the dermis of the skin develop from? |
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Definition
| dermatome of the paraxial mesoderm |
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| Which 3 things develop from the endoderm in the 5th week of development? |
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Definition
| digestive system, respiratory system, and the endocrine glands |
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Term
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Definition
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Term
| 2 main causes for birth defects |
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Definition
genetics
exposure to a teratogenic agent |
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Term
| what is the most important even that occurs during the 8th week? |
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Definition
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Term
| which week does digits on hands and feet develop |
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Definition
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Term
| when can sex of child be determined? |
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Definition
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| what event occurs at the 4th month? |
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Definition
| mandible has developed so fetus exhibits a chin |
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Term
| when are eyelids formed and closed? |
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Definition
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Term
| when do nails begin to develop |
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Definition
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| when can the mother begin to feel fetal movements? |
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Definition
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Term
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Definition
| greasy, cheasy- begins to cover skin at the 4th month/16th week |
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Term
| what month are the eyebrows and eyelashes present? |
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Definition
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Term
| what month does the pulmonary alveoli begin to develop? |
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Definition
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Term
| when is the fetus capable of surviving pregnancy? |
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Definition
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| what month does the fetus normally rotate into the cephalic presentation? |
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Definition
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Term
| which week is their very active movements by the fetus? |
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Definition
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Term
| when do the testes begin to descend down into the scrotum |
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Definition
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Term
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Definition
| 9 1/2 lunar months/ 38 weeks |
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| what 3 things happen at the 10th month? |
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Definition
| -testes are fully descended, the nails project beyond the digits, and the lanugo hair disappears |
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Term
| week head makes up half of the embryo |
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