Not everyone has the time, resources, or talent to make their own graphics. So for those of us who fall into this group, below is a list of some incredible tools that will help you locate millions of free images that can be used legally. You may not know that an artist who takes a photo or creates a graphic has the legal right to share or distribute copies of their work. This legal right is known as copyright, and permission must be granted by the artist to legally use the image.
It is important to note that there are some limits to copyright, such as the Fair Use guidelines (details at copyright.gov). Nonprofit educational purpose is probably the most common copyright exception. For example, students may use images for a class paper and instructors are in most cases allowed to use images for class instruction since it is for educational purposes. Just make sure to cite where you found it so you don’t plagiarize!
HeLa Cells Cultured Electron. Source: Pixabay.com
Cell Cuture (HeLa cells) (26117) -- Anaphase, Metaphase. Source: Wikimedia.org
Photomicrograph depicts HeLa Cells infected with Type-A Chlamydia trachomati. Source: Public Domainfiles.com
HeLa Cells infected with Bacteria Germ V. Source: Pixabay.com
HeLa Cells used as a control for certain experiments. In this fluorescent image, blue indicates the DNA inside the cell nucleas, and the red staining is cellular actin cytoskeleton. Image source: Flickr.com