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Germ Layers Block1
BrownMed
22
Medical
Graduate
08/30/2010

Additional Medical Flashcards

 


 

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Term
term for the 'fertilized egg'
Definition
zygote
Term
What week does organogenesis begin in the embryo?
Definition
week 4
Term
Term for the movement of cells in week 3. Goes from bilayer to trilayer.
Definition
Gastrulation
Term
term for the type of movement epiblast cells exhibit as they travel through the primitive streak
Definition
ingression
Term
Hypoblast cells replaced by _____ cells
Definition
epiblast
Term
mesoderm formed by ingression of ______ cells
Definition
epiblast
Term
notochord created by the ingression of ______ cells
Definition
epiblast
Term
notochord is a dense collection of _____ cells (which layer?)
Definition
mesoderm
Term
Two congenital defects resulting from lack of complete neural tube formation.
Definition
spina bifida, anencephaly
Term
name of ecdoderm structure folding up to form the neural tube
Definition
neural plate
Term
name of ingressed ectoderm that lies superior to the neural tube. goes on the form the PNS and other structures.
Definition
neural crest cells
Term
Names of mesoderm layers starting axially and moving laterally:
Definition
notochord (axial mesoderm), paraxial mesoderm (sclerotome/myotome/dermatome), cardiac tubes, intermediate mesoderm, somatic/splanchnic lateral plate mesoderm
Term
folding that gives ride to the head and tail regions of the embryo.
Definition
cephalocaudal folding
Term
fluid-filled cavity within the mesoderm
Definition
coelom
Term
Ectoderm forms all _____ and some _____ tissues.
Definition
nerve, epithelial
Term
germ layers that give rise to epithelial tissues
Definition
all of them (ectoderm, endoderm, mesoderm)
Term
Mesoderm develops into:
Definition
all muscle, epithelia of urogenital system and cardiovascular system, all connective tissue (excluding head)
Term
endoderm responsible for creating:
Definition
epithelial tissues of the gut tube and derivatives: lungs, trachea, liver, pancreas
Term
ectoderm derivatives:
Definition
epidermis, hair, finernails, tooth enamel, sweat glands, mammary glands, CNS, PNS, melanocytes, connective tissues of the head, adrenal medulla, tooth dentine, great vessels of the heart
Term
neurectoderm
Definition
term referring to the neural tube and neural crest cells
Term
subdivisions of the myotome (somite)
Definition
epimere (muscles of the back), hypomere (muscle of the body wall and limbs)
Term
segmented embryo caused by various ______ along it's length
Definition
somites
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