Black and Blue

When the skin is hit forcefully, such as from a punch, blood is leaked under the skin from the blood vessels. Then the blood cells rise to the surface of the skin.

The released blood cells lose their oxygen, becoming darker red (days 0-2).

As the iron leaches out of the blood cells, the bruise becomes purple (days 2-5).

As the hemoglobin from the blood cell breaks down, it releases a chemical called biliverdin, and the bruise looks green (days 5-7).

As the biliverdin breaks down, the bruise becomes yellow (days 7-10).

Finally, the biliverdin is absorbed by the body and it goes away.

bruise

 

 

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s