What Are The Major Developmental Changes That Occur In The Embryo? The embryo grows rapidly, and the baby’s external features begin to form. Your baby’s brain, spinal cord, and heart begin to develop. Baby’s gastrointestinal tract starts to form. It is during this time in the first trimester that the baby is most at risk
What Is Primary Embryonic Induction? Primary embryonic induction is the first induction event that takes place during early embryogenesis. Firstly, tissues interact to generate the neural tube. … The cells of the neural crest induce the surface ectoderm cells in order to proliferate and invaginate to form the neural tube. What is the secondary induction?
What Are Critical Periods In The Development Process Of An Embryo And Fetus? The process of prenatal development occurs in three main stages. The first two weeks after conception are known as the germinal stage, the third through the eighth week is known as the embryonic period, and the time from the ninth week until