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- 1fetus starts outfemale
- 2srycontrols sex
- 3fertilization happenswidest part of fallopian tube = ampulla
- 4acrosome release enzymego through zona pellucida and corona radiata
- 5acrosomal appartustube between sperm and cell membrane of oocyte
- 6cortical reactionrelease Ca2+
- 7depolarize oocyteno second fertilization and increases metabolic rate
- 8fromfertilization membrane which is depolarized and imprentreabe to other sperm
- 9fraternal twinsdizygotic (2 zygotes form in 2 different areas by 2 different sperm)
- 10monozygoticsingle zygote splits in two
- 11incomplete monozygoticconjoined twins
- 12chorionchorionic plate of baby that is next to placenta and has babies vascular
- 13cleavagezygote undergoes rapid mitotic cell divisions while moving to uterus prior to implantation
- 14zygoteunicellular
- 15indeterminant cleavagecells that can develop into complete organisms
- 16determinant cleavagecells fate already determined
(committed to differentiating) - 17embryo goes from zygote to cleavage tomorula
- 18morulasolid balls of cells
- 19morula to blastulationblastulation forms blastula is an embryo with a blasted out cavity
- 20bastocealinside hollow cavity of blastula (called blastocyst)
- 21blastocystmade of trophoblast and inner cell mass
- 22trophoblastgive rise to chorion and placenta
- 23chorionic villifinger like projections that penetrate endometrium and form from trophoblast
- 24umbilical chord2 arteries and one vein within whartons gel
- 25ectopic pregnancybastula not in the uterus..can be in the Fallopian tubes
- 26trophoblastgive rise to chorion
- 27chorionextraembryonic membrane that turns into placenta
- 28trophoblastscreate chorionic villi
- 29chorionic villigo into endometrium
- 30before placenta formsyolk sac supports the baby
- 31allantoisearly fluid exchange between yolk sac and embryo
- 32allantoissurrounded by amnion
- 33amnionmembrane with amniotic fluid that acts as shock absorber
- 34umbilical chord formed fromyolk sac and allontois
- 35during cleavageembryo stays the same size but more cells = increase surface area = better for gas exchange
- 36blastocystfirst time you see differentiated cells
- 37gastrulationinvagination you have generation of 3 distinct cell layers
- 38invagination during gastrulationendoderm cells
form archenteron which is precursor to GI tract - 39opening of archenteronblastopore
- 40duetorosmesblastopore = anus
- 41protosomesblastopore = mouth
- 42endoderminner most germ layer
- 43endodermendernal organs (internal)
- 44endodermform from archenteron so digestive tract and off shoots
- 45endodermstomach, liver, pancreas, intestine, lungs, and bladder is sex dependent, distal urinary tract thyroid
- 46anus and mouth are not endodermthey are ectodoerm
- 47mesodermmeans o derm
- 48mesoderminvolve movement
- 49mesoderm moveswithin boyd, body itself, and through time
- 50mesodermmuscleskletal, circulatory, lymphatic/immune,kidney,goands
- 51thymus is exception which is formed fromendoderm
- 52ectodermattractoderm (things you are attracted to)
- 53ectodermpersonality and apperance
- 54ectodermskin hair teeth eyes brain pns
integumentary and nervous, nose, mouth, anus, lens of eye - 55taste budsendoderm
- 56neurulationformation of early nerve chord
- 57adrenal medullacontains some nervous tissue so made from ectoderm
- 58mesodermadrenal cortex
- 59differentiationhappens selective transcription
- 60inductionability of one group of cells to influence the fate of other nearby cells
- 61inducershelp with induction and diffuse from organizing cells to responsive cells
- 62inducershelp with neuronal axons and ensure proximity of different cell types that work together in an organ
- 63neurulationdevelopment of nervous system
- 64nervous systemectoderm
- 65neurulationmesodermal cells form notochord (primitive spine)
- 66notochordinduces ectodermal cells to fold making neural folds/neural groove
- 67neural folds turn into neural tube whichis precursor to CNS
- 68tip of each neural foldneural crest cells
- 69neural crest cellsbecome peripheral nervous system
- 70teratogenssubstances that interfere with development
- 71teratogensalcohol, drugs, virus, bacteria, environmental
- 72cleavage2,4,6,8,16 cell emrbyo
- 73implantationoccurs during blastula stage
- 74neural crest cellsPNS including sensory ganglia, autonomic gnaglia, adrenal meduall, schwann cells, calicotonin producing cells of thryoid, and melanocytes of skin
- 75zygote goes to2,4,8,16 - morula, blastula, gastrula
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- MCAT (MCAT Chapter 3) Bio Fichas sobre Sin título, creado por Steve G el 26/06/2016.
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- Steve G
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