Embryological structures and processes

WKP
Definition : Trophoblasts (from Greek trephein: to feed, and blastos: germinator) are cells forming the outer layer of a blastocyst, which provide nutrients to the embryo and develop into a large part of the placenta.
They are formed during the first stage of pregnancy and are the first cells to differentiate from the fertilized egg.
Function
Trophoblasts are invasive, eroding, and metastasizing cells of the placenta.
Trophoblasts mediate the implantation of the embryo into the (...)

See: trophoblast

primitive endoderm

See also
pathogenetic blastocyst

The establishment of left-right asymmetry in mammals is a good example of how multiple cell biological processes coordinate in the formation of a basic body plan.
Nodla flow
The leftward movement of fluid at the ventral node, called nodal flow, is the central process in symmetry breaking on the left-right axis. Nodal flow is autonomously generated by the rotation of cilia that are tilted toward the posterior on cells of the ventral node. These cilia are built by transport via the KIF3 (...)

Pathology
neural tube defects
Videos
neural tube in embryonic chick
neurulation in Xenopus sp.
See also
neurulation
nervous system development

Hansen node

The establishment of left-right asymmetry in mammals is a good example of how multiple cell biological processes coordinate in the formation of a basic body plan.
The leftward movement of fluid at the ventral node, called nodal flow, is the central process in symmetry breaking on the left-right axis.
Nodal flow is autonomously generated by the rotation of cilia that are tilted toward the posterior on cells of the ventral node. These cilia are built by transport via the KIF3 motor complex. (...)