Questions with the keyword 'blood'

• How come when you stand on your head it starts to throb but when you stand on your feet they don’t? by mattc003 to Jon Comments: (No comments so far )
• What is a hemoglobin? by 1drawsome to Cathal, Daphne, Darren, Jon, Katherine Comments: (No comments so far )
• Can blood ever be a different colour to red? by harryj to Cathal, Daphne, Darren, Jon, Katherine Comments: (So far, one comment )