Earwax in the canal. Jaw movement assists this process by dislodging debris attached to the walls of the ear canal, increasing the likelihood of its expulsion. The lubrication provided by cerumen prevents desiccation of the skin within the ear canal. The lubricative properties arise from the high lipid content of the sebum produced by the sebaceous glands. In wet-type cerumen, these lipids include cholesterol, squalene, and many long-chain fatty acids and alcohols. While studies conducted up until the 1960s found little evidence supporting antibacterial activity for cerumen, more recent studies have found that cerumen has a bactericidal effect on some strains
Education sector responses to substance abuse or supporting resilient mental health or acquiring life or academic skills. Curriculum aiming to prevent substance use before the typical age of first use within the school system is directed at children who are around 6–12 years old. The typical age of first use of any substance will vary according to the national or local situation. Prevention education curriculum during this period is centred on what is referred to as ‘skills-based health education’. It aims to develop key personal and social skills such as those that support healthy emotional and social development during this period, and protect against later substance