Understanding Bruises and Their Color Changes

The video humorously begins with a joke about a man walking into a bar, leading to a discussion on the science of bruises. It explains how bruises form due to broken capillaries and the subsequent color changes as the body breaks down hemoglobin. The video details the progression of colors from red to blue, green, yellow, and brown, explaining the biological processes behind each stage. It concludes with a thank you to Patreon supporters and promotes SciShow's kids channel.

What is the initial color of a bruise and why does it appear that way?

• Yellow, because of bilirubin

• Green, due to biliverdin

• Red, because of hemoglobin in the blood

• Blue, due to lack of oxygen

What causes the blood to leak out and form a bruise?

• High blood pressure

• Sunburn

• Excessive sweating

• Broken capillaries

Which compound is responsible for the brownish color in bruises?

• Hemosiderin

• Globin

• Bilirubin

• Biliverdin

What happens to the globin part of hemoglobin in a bruise?

• It turns into hemosiderin

• It is broken down into amino acids

• It becomes biliverdin

• It remains unchanged

Which enzyme breaks down heme into biliverdin?

• Heme oxygenase

• Hemoglobinase

• Globinase

• Bilirubinase

What color does biliverdin impart to a bruise?

• Red

• Yellow

• Green

• Brown

What is the final color a bruise turns before it disappears?

• Blue

• Red

• Brown

• Yellow

Where does bilirubin go after it is formed in a bruise?

• To the heart

• To the liver

• To the lungs

• To the kidneys

What is the role of white blood cells in the color change of a bruise?

• They cause the bruise to swell

• They prevent bruising

• They break down hemoglobin

• They make the bruise red

How long does it typically take for a bruise to disappear completely?

• Several months

• A month

• A couple of weeks

• A few days