Carbon dioxide diffuses out of the tissues and into the blood, where it is dissolved in the plasma. While some of the carbon dioxide remains dissolved in the plasma, most carbon dioxide diffuses into our red blood cells.
A screencast is a digital movie in which the setting is partly or wholly a computer screen, and in which audio narration describes the on-screen action. It's not a new idea.
However, there are a multitude of feature-filled programs out there that do a much better job in this area. Using screencasting tools can be a great way to create comprehensive video tutorials, demonstrate how to use software and/or specific features, as well as live stream and share content.