Gastrulation Flashcards
Where do the head and neck form from the 16 day embryo?
The primitive knot (Hensons node)
What occurs during gastrulation?
Movement of cells to form a gastrula
What space forms between the epiblast and hypoblast?
Mesoderm
What is the primitive streak?
Line of cells on epiblast that move into the mesoderm
What is the fate of the cells from the primitive streak?
Some become the mesoderm some populate the middle section of the hypoblasts and push the hypoblasts to the side forming the endoderm
At how many days do the 3 germ layers form?
18 days
What does the epiblast form (germ layer)?
Ectoderm
From which part of the ectoderm does the nervous system form?
Neural groove
What is neuralation?
The formation of the NS from the neural groove as the groove depends and the edges come together forming the neural tube
What are the sub-sections of the mesoderm?
Paraxial, intermediate and lateral plate
Once the neural tube has formed what does the ectoderm become?
Epidermis
What arises from the neural tube?
Brain and spinal cord
