Answer to Question #119346 in Evolution for Joelyn Odame

Question

Changes that take place in the brain of a 5-week embryo

Answer 1

During the 5th week the ectoderm is forming which makes up the nervous system. Developing of the groove begins which then transforms into neural tube. Neural tube forms a chord, central and peripheral system. 5th week is the period when the first synapses are found in embryos.