CD-ROM for Windows. Low oxygen levels trigger yawning after a period of shallow breathing. A yawn forces oxygen rich air into your lungs where it can be passed into the bloodstream. This CD-ROM from Dorling Kindersley is filled with answers to many why and how questions. Organs are shown in their proper location and the student can remove them one by one to see the underlying organs.
Text is available if the student wishes to find out more about a particular organ.
Click on any item in red for additional information. I recommend having the sound set to off. Having the sound off does not affect audio statements when a new section is opened. Neither does it affect pronunciation and audio during animations. Both male and female voices are used for audio portions.