For teenagers and young adults, symptoms of fatigue, fever and loss of appetite occur for roughly two to three weeks after the mononucleosis incubation period.In these cases, symptoms force infected individuals to refrain from school or work for a period of time.or teenagers and young adults, symptoms of fatigue, fever and loss of appetite occur for roughly two to three weeks after the mononucleosis incubation period.
Hair is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin.The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft.air is simple in structure, but has important functions in social functioning. Hair is made of a tough protein called keratin. A hair follicle anchors each hair into the skin.
The hair shaft - the hair we can see - is actually dead. It's made up of three layers of keratin, a hardening protein. The innermost layer of the hair shaft is the medulla. Depending on the type of hair, the medulla may not always be present. The middle layer is the cortex, which makes up the majority of the hair shaft.