Fig. 3. A. Electron micrograph of a capillary in a baby 4 days after birth: A large blood corpuscle is found within the vessel. The corpuscle has a large nucleus. Scale bar 1µm. B. Electron micrograph of collagen fiber bundles in the dermis of a baby 4 days after birth. The bundles do not show the characteristic striated pattern which is caused by polymerization of type I or III collagen. Scale bar 1µm. C. Electron micrograph of a developing follicle in a baby 7 days after birth. Anlage cells of the follicle are arranged cylindrically, and another type of cell surrounds the circumference. Scale bar 10µm.