Copyright © Jeremy Sandy
FullThrottleMarketer.net
244 Days To Go
Between week four and week eight, the development of the baby's facial features takes place. Five folds of tissue accumulate at the base of the head to provide the raw material for the chin, cheeks, upper jaw, and ears. Two arches form that will become the upper and lower jaws. The groove of tissue that will form the larynx (your voice box) and trachea (your windpipe) appears. Five more pairs of somites have formed. Now eight pairs of somites are present, and the neural tube (the spinal cord) will begin to form between them. The chest and abdominal cavities are continuing to form. Lung buds (tissue from which the lungs will form) appear in the chest cavity. If the baby's heart didn't begin to beat yesterday, it will start today. Circulation is beginning to develop in the mesoderm, the yolk sac, and in the lining of the placenta.
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