Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

37 Cards in this Set

  • Front
  • Back
Formation of the neural plate
begins on day ______
chemical induction caused by ________
tissue of neural plate is _________
neural tube formation begins on day ________-
location of closure
middle to ends
delayed closure results in
spinal bifida, acrania, or anencephaly
neural crest is the first mesenchymal invasion T/F
F (second)
origin of the neural chrest
arises from the neural folds at the junction between the neural plate and the ectoderm
where do cells of neural crest migrate?
within mesenchymal compartment moving anteriorly (ventrally w/ major concerntration of cells posteriolateral to neural tube
what is the fate of the neural crest?
body - peripheral nervous system, suprarenal medulla & melanocytes
head - cartilage, bone peripheral nerves and is associated w/ branchial arts
What are the morphological components of the embryonic folds
1)head fold
2) tail fold
3) lateral body fold
where is growth of embryo most rapid
neural growth is most rapid especially head fold region
mesenchyme, esp. somites grow in both head & body contributing to _____________
lateral body folds
head tail and lateral folds distinguish embryo from future ___________
umbilical chord
_______ contracting help to form the neural tube
actin filaments
umbilicus arises from which two things
yolk sac and connecting stalk
vitallene duct
connection between yolk sac and gut tube
blind ended sac from gut tube
origin of septum transversum
septum transversum is originially the most cranial structure just underneath the heart. When head fold starts growing rapidly it pushes heart and septum transversum down. Septum transversum will ultimately become the central tendon of the diaphram
oropharyngeal plate becomes
cloacal plate becomes
development of umbilical chord
the yolk sac and connecting stalks grow much more slowly than the head, tail, & lateral folds they thus turn into the umbilical chord
ectoderm becomes
glands(sweat, sebaceous, mammary)
hair, nails
eye: lens & corneal epithelium
inner ear labyrinth
anterior pituitary
neuroectoderm becomes
spinal cord
eye: retina, pigment, epithelium, parts of iris, optic nerve
pars nervosa of pituitary
endoderm becomes
alimentary canal (pharynx, esophagus, stomach, intestines)
epithelium and glands only
pangreas & liver
salivary glands
palatine & lingual tonsilar epithelium
thyroid and parathyroid glands
thymus (epithelial components)
lung trachea & larynx (epithelium & glands)
middle ear;; epithelium
mesoderm in all tissues becomes
blood vessels (endothelium & smooth mm)
purse string closing concept results in what feature of the developing embryo
caudal and raustral neuropore
when does caudal neuropore close?
rostral neuropore
Rostral Neuropore: normally closes day 25. Delay results in Exencephaly.

Caudal Neuropore: normally closes day 27. Delay results in spina bifida.
what vitamen is important in neural tube closing
vitamen B6- folate
mesoderm somite becomes
dermis, skeletal mm, vertebrae
mesoderm intermediate becomes
adrenal cortex, ureters, kidney & reproductive organs
lateral plate somatopleure mesoderm becomes
peripheral skeleton & dermis
lateral plate splanchnopleure becomes
smooth mm, vessels & CT around GI tract & bladder
nonspecific primary mesoderm becomes
dura and eracnoid matter - red & white blood cells
spetum transversum becomes
central tendon of diaphram
neural crest in the body becomes
PNS (ganglionic cell bodies, schwann cells, adrenal medulla, melanocytes
neural crest in the head becomes
all cell types of neural crest in body* plus some cartilage & bones of skull
*PNS (ganglionic cell bodies, schwann cells, adrenal medulla, melanocytes