Cartilage between bones acts as a cushion and provide a smoother surface for joints to rub against. In oth â¦ er places it acts as a shaping structure. The tip of the nose and ears are composed almost entirely out of cartilage.
Story at-a-glance 1  -. Eating your boogers may help introduce pathogens from your environment to your immune system, helping it to learn and build defenses, according to a new theory in support of the hygiene hypothesis.
I assume eating your own boogers boosts your immune system not because of the mucus but because the act of regularly putting your fingers in your mouth. Your body produces anti bodies if it comes in contact with bacteria or viruses in a small or weak amount/form. It works the same way as vaccines do.