¿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 is the reason for the blue color of horseshoe crab blood?

How does the blood of earthworms differ in color from human blood?

What molecule in human blood is responsible for its red color?

Explain how hemoglobin changes color when oxygenated and deoxygenated.

Why is hemoglobin considered the most effective oxygen transporter on earth?