Call your doctor if your baby: 1  Is under 3 months old and has a temperature over 100.4 F. 2  Is over 3 months old and has a fever over 102 F. 3  Has a fever that lasts longer than 24 hours.  Has diarrhea, vomiting, or a rash with the 1  fever. Is very sleepy or looks sick.  Can't be soothed.
There is two main pigments found in human hair: Eumelanin has an oval or elliptical shape, which gives color to brown or black hair and is dark pigment. The higher the concentration of Eumelanin the darker the hair. Pheomelanin is what produces the color in blonde or red hair.
Your hair is made up of two distinct structures: the follicle and the shaft. The follicle is a tunnel-like segment in the epidermis portion of your skin.It resides under the surface of the skin and extends down into the dermis. The base of the follicle contains tiny blood vessels that nourish the hair cells.he living part of the hair is the bulb at the base, while the shaft-the part of the hair that we see above the skin-is dead. The hair shaft is made up of a protein called keratin. The inner layer (the medulla) and the middle layer (the cortex) constitute the majority of the shaft.