Red blood cells are produced in yolk sacs during the pre embryo stage in the liver and lymph nodes.

Hemoglobin is the protein inside red blood cells that carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale. Red blood cells are made inside your bones, in the bone marrow.

Where was Billy born?

How was Billy Made?

How Long did it Take for Billy to be created?

It took 7 days for Billy to mature to be able to go to through the body.