Questions with the keyword 'blood'

• Why are our veins blue and purple but our blood red? by Sharmin_the BEST to Hayley, Jimi Comments: (So far, one comment )
• Is our blood actually green? by 249sgde23 to Hayley Comments: (No comments so far )
• what would happen if you did not need a heart and blood? by domino90 to Chris, Hayley, Jimi, Maddison, Omur Comments: (so far, 3s comments )