Ebryology 2 Flashcards
what happens in week 3
gastrulation
neurulation
development of somites
early development of cardiovascular system
what does gastrulation mean
formation of germ layers
what does neurulation mean
formation of the neural tube
what is the function of the notochord
secretes signals that influences cells around it this cause the neuralplate to form
what does the neural plate sink down to form
the neural tube
what will the neural tube eventually develop into
the CNS
what germ does the neural tube induce to thicken
mesoderm
how many blocks does the mesoderm divide into
3
what are the three separate parts that the mesoderm divides into called
paraxial mesoderm
intermediate mesoderm
lateral plate mesoderm
what are the 2 layers that the lateral plate mesoderm splits to form
somatic mesoderm
splanchnic mesoderm
what does the paraxial mesoderm go on to form
somites
what does the intermediate plate mesoderm form
urogenital system (kidneys and reproductive)
what does the lateral plate mesoderm go on to form
body cavity and coverings
each somite (paraxial mesoderm) will eventually divide into 3 more layers what are these
dermatome
myotome
sclerotome
what is the dermatome
dermis of the skin
what is the myotome
the muscles
what is the sclerotome
bones including vertebrae
what is teratology
study of when things go wrong during development
during pregnancy what weeks pose the biggest risk of teratogens
weeks 3-8
what is Rubella
viral infection that used to be common in children. It’s usually a mild condition that gets better without treatment in 7 to 10 days.
what does chronic villus sampling test examine
allows examination of the fetal karyotype and /or genotype
what are common postnatal tests to check for malformations
hip stability
testes(descent)
fingers toes
hearing
