This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Paranasal sinus front.svg Zatoki przynosowe Nasennebenhhlen Sinus paranasales Nnhfront svg UTC Nnhfront svg myself derivative work Micha Komorniczak talk Translation to polish Komorniczak Nnhfront svg PDUSGov original upload log This image is derivative work of the following images File Nnhfront svg with PDUSGov Mik Bytes no