Blood contains several things.

Blood is icky when it’s not inside stuff.

Re: Blood

From not very far away at all, blood looks like this:

The Greeks used to think blood was produced exclusively by the liver, and the word “blood” is used in many modern day phrases. Interns are currently looking up examples of those phrases.

Re: Blood

Blood delivers necessary substances to the body’s cells.  These substances include but are not limited to nutrients and oxygen.

Re: Blood

From a reasonable distance, blood looks like this:

Re: Blood

Blood transports waste from the very same cells to which it delivers oxygen, nutrients, and other substances.