Vintage Casio blood pressure monitor watch.
<video controls autoplay loop style="max-width: 100%;">
<source src="https://diqn32j8nouaz.cloudfront.net/tooltalk_17389017672391.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
Previously:
18th century Austrian bloodletting knife - photo
Blood spatter guide - infographic
Blood under a microscope - GIF
CPR mannequin showing blood flow - GIF
