What does a human baby's ultrasound look like at 5 weeks?

At five weeks the baby to be is still an embryo, it will not become a fetus until the end of the first trimester. At five weeks the embryo is still masses of cells that are forming body parts. There are groups that will become the heart and circulatory system, the heart is beating and blood cells are beginning to flow. The nervous system (brain and spinal cord) are forming and CSF will soon be flowing. There are buds forming that will become arms, legs, hands and feet. While the embryo bares little resemblance to the baby it will be, the growth over the last five weeks is amazing.