Decorative images can be used to liven up a presentation or other project and may not need to be specifically health sciences in nature. The sources that follow are good options for decorative images. Be sure to see the Privacy & Publicity Rights section of this guide.
These sites provide images that are free to use under their own licensing agreements. These images are neither in the public domain nor Creative Commons licensed.
Read the Unsplash terms to learn how their images can be used.