Fetus 9 Week Old Brain and Lung
Computer generated Image reconstructed from scanned human data. Actual size of fetus = 1.5 inches, 0.14 oz. This image provides a left-sided view of a 9-week-old fetus. The age is calculated from the day of fertilization. The image has been manipulated so that both internal and external structures are visible. In the head region, the brain is highlighted in pale yellow, and the left eye and left ear are indicated as pink rings. The left lung, shown beneath the arm, is marked in dark yellow. The liver, shown beneath the lung, is highlighted in pink. The dark pink tube-like structure alongside the fetus is the umbilical cord, which provides means of exchanging nutrients and wastes between mother and fetus. At this phase, the fetus begins to uncurl. Its head becomes more erect, back straightens, and the abdomen tucks in.