PSA: Human blood is not blue

Dumac

Diamond Member
Dec 31, 2005
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in any natural form.

Thanks for listening.

EDIT: Fixed title for clarity
 
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cKGunslinger

Lifer
Nov 29, 1999
16,408
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No, no, no. You see, it's blue when it's in your veins, and quickly turns red when oxygen hits it!
 

Gibson486

Lifer
Aug 9, 2000
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Well...I had a dr tell me once that if your blood is purple, it means it had alot of oxygen and that it was really close to the heart....
 

guyver01

Lifer
Sep 25, 2000
22,135
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All those animals that have haemocyanin as the respiratory pigment have their blood blue when oxygenated. Haemocyanin is the respiratory pigment akin to haemoglobin but hemocyanin has copper as the cofactor instead of iron which you find in haemoglobin.

Animals belonging to class crustacea and those belonging to phylum Mollusca have hemocyanin, and hence they have blue blood.

Some notable crustaceans are crabs, lobsters, shrimps.

Some notable mollusks include Snails, whelks. mytilus, oysters, chitons, squids, sepia, octopus.

Limulus, called a horseshoe crab, also has hemocyanin.
 

lozina

Lifer
Sep 10, 2001
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smurf2_2.jpg
 

Dumac

Diamond Member
Dec 31, 2005
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Yeah, I meant human blood. Sorry for the ambiguous thread title.

I'm just tired of people swearing to me that human, oxygen-deficient blood is blue.
 
Feb 6, 2007
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I'm just tired of people swearing to me that human, oxygen-deficient blood is blue.

No, it's blue when it's in your veins and then when it hits the air it turns red. Its called the Coriolis Effect. It's the same thing that gives Mars its color.