TLS Online TPP Program

#Id: 1030

#Unit 5. Developmental Biology

In primary neurulation, 

cells surrounding the neural plate direct the neural plate cells to proliferate, invaginate into the body, and separate from the surface ectoderm to form an underlying hollow tube.

TLS Online TPP Program

#Id: 1031

#Unit 5. Developmental Biology

In secondary neurulation, 

the neural tube arises from the aggregation of mesenchyme cells into a solid cord that subsequently forms cavities that coalesce to create a hollow tube.

 

TLS Online TPP Program

#Id: 1032

#Unit 5. Developmental Biology

Primary neurulation forms the anterior portion of the neural tube

TLS Online TPP Program

#Id: 1033

#Unit 5. Developmental Biology

Secondary neurulation forms the posterior portion of the neural tube 

TLS Online TPP Program

#Id: 1034

#Unit 5. Developmental Biology

In birds, primary neurulation generates the neural tube anterior to the hindlimbs.

TLS Online TPP Program

#Id: 1035

#Unit 5. Developmental Biology

In mammals, secondary neurulation begins at the level of the sacral vertebrae of the tail.