Oil glands in the hair or hair type

Hair contains oil glands which serves to soften and moisturize. Oil glands (sabum) This is fat that is produced by the sebaceous glands are found on the scalp. Sebum will spread over all the surface of the hair shaft. Especially when we are combing or brushing hair.
Normal hair has sebum levels are balanced and do not look too greasy and shiny. But also not too dry. If excessive levels of sebum, the hair will be oily, shiny and dirty quickly. Hair greasy hair as it's called. If the sebum levels slightly, the hair becomes dry and rough so not shiny and dull impressed. This difference is closely related to the productivity of the sebaceous glands in the scalp that there is balanced, less or excessive.
Coarse vs. fine hair
Form of straight hair, wavy and curly depending on the form of tubers (roots) hair. Straight hair grows from the hair bulb round. Wavy hair that grows from the hair bulbs are oval or oblong eggs called. Lastly, curly hair grows from the hair bulb-shaped flat.
Latest facts about hair.
Hair grows to 3.2 mm per week. Or up to 12cm in a year or at 8.5 m for each new hair throughout life.
By nature, women lose as much as 30-60 strands of hair every day, every 6 years hair bulb and hair shaft change would fall out. New hair, started growing after a time span of 3-4 months.
Hair consists of the same material as the nail is keratin. But on the nail, this substance berdungsi as loud horn that is different from that contained in the hair.