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Why some creatures have blue blood?

It is a well known fact that humans and a majority of other mammals on our planet have red blood but there are some creatures that have blue blood. This article will explain some facts why some mammals have blue blood.

Horseshoe crab have blue blood due to the high levels of hemocyanin (copper protein) in the blood
Horseshoe crab have blue blood due to the high levels of hemocyanin (copper protein) in the blood
From: Ndricim Topalli
Published: 26/09/2019 22:14

Different blood colours are caused by different proteins and pigments that are found in the blood. Such proteins will serve different purposes for the mammal that contains them to survive in different conditions such as below freezing point or other conditions.

One of the proteins that gives some mammals blue blood colour is the proteins called hemocyanin derived from copper. If proteins had higher levels of iron then their blood colour will turn into red colour.

Colour of the blood is also based on the oxygen levels that are present in the blood. Blood that contains oxidized copper proteins and the blood is oxygenated it turns blue. If blood is not oxygenated then it is colourless.

Some species that have blue blood are:

Horseshoe Crabs

Horseshow crab has light blue colour due to the high levels of copper protein in the blood

Horseshow crab has light blue colour due to the high levels of copper protein in the blood

The horseshow crabs have light blue blood, due to the high levels of copper protein in its blood. Because of the high levels of copper protein in the blood, horseshoe crabs have high levels of resistance to bacteria, and it is one of the reasons why it has survived for more than 400 million years.

Spiders

Spiders have light blue blood colour due to the high levels of copper protein in the blood

Spiders have light blue blood colour due to the high levels of copper protein in the blood

Spiders also have light blue blood colour because of the high levels of hemocyanin (copper protein) in the blood.

Scorpions

Some scorpions have light blue blood colour due to the high levels of copper protein in the blood

Some scorpions have light blue blood colour due to the high levels of copper protein in the blood

Some scorpions, especially the largest species of scorpions, have light blue blood. Also such types of scorpions have high levels of hemocyanin in the blood.


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