The scalp is the outermost layer of skin on the head and is made up of five layers. The scalp is important for protecting the skull and brain, regulating body temperature, and providing sensory information. The hair on the scalp is made up of keratin and grows from hair follicles. The scalp is also rich in blood vessels and nerves, which can make it sensitive to pain and injury. Injuries to the scalp can range from minor cuts and bruises to more serious conditions like scalp infections and tumors. Proper care and hygiene of the scalp are important for maintaining healthy hair and preventing scalp-related issues.