¿Por qué es roja la sangre?

The video explores the different colors of blood in various animals. It explains that while many assume all blood is red, this is not the case. Horseshoe crabs have blue blood due to hemocyanin, earthworms have pink blood because of emeritrin, and humans have red blood due to hemoglobin. Hemoglobin is highlighted as the most effective oxygen transporter, making red the most common blood color in the animal kingdom.

What causes the blood of horseshoe crabs to appear blue?

• The presence of iron in their blood

• The presence of copper in hemocyanin

• The presence of emeritrin

• The presence of chlorophyll

Which molecule is responsible for the pink color of earthworm blood?

• Hemoglobin

• Emeritrin

• Hemocyanin

• Chlorophyll

What element in hemoglobin gives human blood its red color?

• Magnesium

• Zinc

• Iron

• Copper

How does the color of human blood change when it is deoxygenated?

• It becomes pink

• It becomes darker red

• It turns green

• It turns blue

Why is red the most common blood color in the animal kingdom?

• Because hemoglobin is the most effective oxygen transporter

• Because most animals have copper in their blood

• Because red blood cells are larger

• Because red blood is more efficient at carrying nutrients