Embrology Flashcards
What is teh embroyonic phase
weeks 0-3
what is teh embroyonic phase
weeks 4-8
what is teh fetal stadge
weeks 9-40
name for femal reporduction cells
ovum
process of producingsperma dn ovums
mitosis
ititual sperm and ovum cell
spermatogonium and oogonium
first cell produced afger fertilisation
zygote
what does the zygote durin into
morula - soil ball of cells
what are examples of disease that are inherited from the mother
leber’s hereditary opic neurophath, blindless
what do morula turn into
blastocystic cavity
what is teh outer lineing of the blastocytic cavity called
trophoblast
what is teh inner cell mastq
part of blastocyte where the cell group together
what moves the fertilised ovum algon the pholpina tube
cilia
ectopic pregnacty
happens in uterine tube
what cheical are proced by the folagues near the ovary
estrogen and progesion
when does the placent start to develop
about 2 weeks
what does teh tropoblast turn to next
chorion
what is chorion
villi like process to form plecentsa
what organ secreaetes human chronica gonadotropin
chorion
endometrium
uterine wall
what point does the blastocyst start to burry into tehuternie wal
about 7
decidua basalis
a stucture that attaches to the endothelium to allow nutrience and blood flow to pass through
what is superior and inferior, epiblast or hypoblast
epiblast superior, hydroblast inferior
what does the epiblast form
amniotic cavity
what does hte yolk sac form from
hydroblast
bilaminar disc
cells of inner cell mas form a 2 layered flat disc called a bilaminar disc
what is the function of the placenta
foetal nutrion, transport of waste and gases , imunity
what is teh feoal part of the placenta surface like
smooth with foetal blood vessels and end of the umbilical cord
what is the materianl part of the uterous like
made of deciu basalis, it is rough and has material blood vessels
how do identical twins form
1 ovum and 1 sperm to 1 sycogts, to tow differ embyoyes
how to fraternal (non idetnil twis form)
2 ova, 2 sperma nd 2 seperate zygotes
differene beetwen dizygotic and monozygoic
monozygotic - idential, dizygotic, non identical
gastrulation
formulation of germ layers in week 3
neurulation
formation of the neural tube
primative streak
formed in the midline of the epiblast by dipping cells to form mesoderm layer
what is most superior middle and inferior
ectoderm, endoderm, mesoderm
ectoderm,
mesoderm,endoderm
what is a notocord
a solid tube of cells that turns into a neurtal tube
what cells turn the notcord to a neural tubw
ectodermao
what are the 3 divisions of te mesoderm from proximal to medial to distal
paraxial mesoderm
intermedial plate mesoderm
lateral plate mesoderm
what doese the paracial turn into
dermatone,mytome and sclerotome
when does the heart start to beat
day 24
when does latarel fold in tube occur
3rd week
what does the gut form from
endoderm
what does teh urogential system form from
intermida mesoderm
what does the body cavity from from
lateral plate mesoderm
what is teh lateral folding
forlindin so the endoderm endos up of the inside to from the gut
the mesoderm forms the splanic and somatic systems
the ectoderm frmos outsdie
when does te head and tail fold occur
between weeks 4-6
what are somites form
from dermates, myotomes and scleromtes
thalidomide
tradegy of drug given to pregnant mothers to stop moring sickness caused limb issues
