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| later on the cells become more________ |
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| _____ _____is the first trimester, specific things develope at specific times |
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| any substance that can cause birth defects, during the pre embryonic stage, beginning of pregnancy, all or nothing |
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| teratogens have less effect during the ____stage on the fetus except for the CNS |
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| causes decreased oxygen & low birth weight |
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| the time before delivery relating to the baby |
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| The outside layer of cells in a blastocyst |
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| inside group of cells of the blastocyst |
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| implantation usually takes place in the _____ _____uterine wall |
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Definition
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| implantation takes place ______ after fertilization |
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Definition
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| ____is the endometrium after implantation has occurred |
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Definition
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| the portion of the decidua that covers over the blastocyst |
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Definition
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| The part of the decidua that is under the blastocyst |
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Definition
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| Decidua vera refers to what part of the decidua |
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Definition
| all but the capsularis & the basalis |
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Term
| embrionic membranes begin to for at the time of_______ |
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Definition
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| membranes protect & _____the embryo |
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Definition
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| The_____is the first membrane to form |
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| The chorion developes from the trophoblast & has finger like projections called ______ ______ |
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Definition
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| The chorionic villi are the ground work for the _____ |
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Definition
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| _____is the hormone produced by the chorion that is the basis for pregnancy tests |
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Definition
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| HCG causes continuous secretions of ____&_____that prevents menstration & ovulation |
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| ____week the primitive placenta begins to function |
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Definition
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| in the 3rd week the 3 embryo is 3 layers & called_______ |
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Definition
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| name the layers of the trilaminar embryo |
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Definition
| endoderm, mesoderm, ectoderm |
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| forebrain delvelopement occurs in the ____week |
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Definition
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| forbrain developement is considered____ |
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| the primitive heart starts to beat at ___weeks |
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Definition
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| all essential body systems are present by the end of the ____week |
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Definition
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| ____is the means for metabolism & nutrient exchange between the embryonic & maternal circulation |
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Definition
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| The placenta developes at the site where the embryo attaches to the unterine wall from the chorionic villi & the _____ ______ |
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Definition
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| The placenta has a ______lifespan |
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Definition
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| the fetal surface of the placenta is ____& covered with amnion |
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Definition
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| the cotyledons is the site where everything crosses from mother to baby & they are on the ____side of the placenta |
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Definition
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| the placenta is a temporary____gland because it secretes hormones |
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Definition
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| the umbilical cord is aprox 20 inches & attaches the baby to the to the |
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| The unbilical cord is comprised of |
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| special connective tissue that surrounds the umbilical cord |
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Definition
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| the shiny membrane that is part of the placenta |
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Definition
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| There are ___-____ml of amnionic fli=uid |
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Definition
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| fertilization normally occurs in the ______ |
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Definition
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| The sticky, black-green substance found in the bowel of the fetus and newborn is called ____ |
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Definition
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| The new cell formed from the union of the ovum & the spermatozoa is |
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Definition
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| The bumpy, enlarging zygote that looks like a mulberry is called |
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Definition
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| The membranes that lie next to the fetus & is reponsible for producing the fluid that surrounds the fetus is called the_____ |
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Definition
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| The embryonic tissue that is the forerunner of the mucous membranes, hair, tooth enamel, nails and nervous system is the____ |
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| primitive heart function begins to function |
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Definition
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| all essential systems are present |
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| external sex identification possible |
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| lanugo & vernix caseoa decreasing |
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| testes descend from abdomen |
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| active fetus, quickening felt by mom |
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| shunt between the atria of the heart |
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| two eggs, two sperm, usually separate placentas |
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