Questions with the keyword 'oxygen'

• Why do the human lungs only accept Oxygen and not other gases? by emeralddragon101 to Emma, Kristyn, Peter . Comments: (No comments so far)
• How long can a brain go without oxygen and still be able to process to a certain degree and what are the conditions for by realmadrid1 and 2 others. to Emma, Josie, Kristyn, Peter, Sarah . Comments: (No comments so far)
• my friend said that your blood is blue inside your body and it changes to red when it reaches oxygen, is this true by sarahisawesome1 to Emma, Josie, Kristyn, Peter, Sarah . Comments: (No comments so far)