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.
The Google Chromecast is a $35 media streamer with no remote or on-screen interface at all. You need a smartphone, tablet, or PC to stream anything to the Chromecast; without one of those devices, it's just a useless plastic stick.