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.
Why do kids eat boogers? Believe it or not, the composition of boogers may actually taste sweet to kids. Your little angel takes the stage, and you instantly forget all the sleepless nights, spit-covered lapels and tantrums that brought you to this moment.