The embryo has hands with ridges that will grow into fingers, and two-segmented arms. The embryo has feet, thighs, and calves. Internal organs are growing. The tongue, esophagus and stomach are well developed, as are the kidneys. The embryo's liver, gall bladder, and pancreas have been developing for several days.
Lungs begin to develop.
Her thyroid and other glands are forming. The embryo's face and sensory organs are forming. Reproductive organs are beginning to form. The brain divides into more specialized segments. The forebrain develops into two distinct sections, called the telencephalon and the diencephalon.