
Testicles
Your testes could be holding up to 329 micrograms of microplastics per gram of tissue—that's a plastic Tic-Tac in each of your boys.
Liver
Chiang et al. discovered six types of microplastics in human liver tissues, with higher concentrations found in scarred livers compared to healthy ones.

Heart
In a study of 15 cardiac surgery patients, microplastics were found in every heart, with some pieces as large as a grain of sand.