Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Heart, illustrated as a pumping machine. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.
Public Domain Mark
You can use this work for any purpose without restriction under copyright law. Read more about this licence.
Credit
Heart, illustrated as a pumping machine. Wellcome Collection. Public Domain Mark. Source: Wellcome Collection.