EDUCATION (CBSE/UGC NET)

Detailed explanation-1: -Just four weeks after conception, the neural tube along your baby’s back is closing. The baby’s brain and spinal cord will develop from the neural tube. The heart and other organs also are starting to form. Structures necessary to the formation of the eyes and ears develop.

Detailed explanation-2: -The fetal brain begins to develop during the third week of gestation. Neural progenitor cells begin to divide and differentiate into neurons and glia, the two cell types that form the basis of the nervous system. By the ninth week, the brain appears as a small, smooth structure.

Detailed explanation-3: -The fetal stage of prenatal development lasts from week nine until birth. During this stage, the fetus will continue to develop organs, including the brain and spinal cord. Between weeks nine and 12, the fetus will begin to make movements with their arms and legs.

Detailed explanation-4: -A fetus is a prenatal human being between the embryonic stage and birth. The fetal stage extends from the beginning of the ninth week after fertilization to about 38 weeks after fertilization, which is the average time of birth. The fetal stage lasts a total of approximately 30 weeks.

Detailed explanation-5: -Development begins at the moment of conception, when the sperm from the father merges with the egg from the mother. Within a span of nine months, development progresses from a single cell into a zygote and then into an embryo and fetus.