# Blood is blue and turns red on exposure to air?

**URL:** <https://boards.straightdope.com/t/blood-is-blue-and-turns-red-on-exposure-to-air/430811>\
**Category:** Factual Questions\
**Created:** [December 21, 2007, 6:54am UTC](https://boards.straightdope.com/t/blood-is-blue-and-turns-red-on-exposure-to-air/430811 "2007-12-21T06:54:57Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![irishgirl](https://avatars.discourse-cdn.com/v4/letter/i/8edcca/32.png) [@irishgirl](https://boards.straightdope.com/u/irishgirl)\
**Post date:** [December 22, 2007, 11:09am UTC](https://boards.straightdope.com/t/blood-is-blue-and-turns-red-on-exposure-to-air/430811/21 "2007-12-22T11:09:33Z")

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To take blood from a vein you don’t look for it (visible blue veins are often small and fragile), you feel for it. Madonna would be perfect to take blood from, all those big, cordy veins.

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