How is the cuticle like a plastic bag?

The cuticle can be likened to a plastic bag because it serves as a protective barrier, sealing in moisture and preventing external elements from entering. Just as a plastic bag keeps its contents secure and safe from contamination, the cuticle shields the nail bed and underlying tissues from bacteria and injury. Additionally, both the cuticle and a plastic bag can be flexible yet durable, adapting to their contents while maintaining their structural integrity.