What Color is Your Blood?

The video explores the common misconception that human blood is blue until exposed to air. It explains that blood is always red, with its color influenced by oxygenation levels. The video also discusses the composition of blood, including plasma, red and white blood cells, and platelets. It highlights how different organisms have varying blood colors due to different proteins, such as hemocyanin in mollusks and hemerythrin in marine worms. The video concludes by clarifying that human blood appears blue in veins due to light wavelengths, not because it is actually blue.

What is the common misconception about the color of human blood inside the body?

• It is purple due to hemerythrin.

• It is yellow because of plasma.

• It is green due to biliverdin.

• It is blue until it is exposed to air.

What component of blood is primarily responsible for its red color?

• Hemoglobin

• Platelets

• White blood cells

• Plasma

Which protein is found in the blood of most mollusks, giving it a blue color?

• Hemocyanin

• Hemoglobin

• Hemerythrin

• Biliverdin

Why does blood appear blue in veins when viewed from outside the body?

• Due to the presence of biliverdin.

• Due to the way light wavelengths penetrate the skin.

• Because it lacks oxygen.

• Because it is actually blue inside the body.

What is the difference in color between arterial and venous blood?

• Arterial blood is purple, venous blood is pink.

• Arterial blood is green, venous blood is yellow.

• Arterial blood is brighter red, venous blood is darker red.

• Arterial blood is blue, venous blood is red.