It is in the small intestine. Specifically, the crypts (the tiny spaces) between the intestinal villi. Here is what some leading edge research scientists believe takes place in your body when red blood cells are created.
The villi in the small intestine are like roots of a plant. The liquefied food that arrives from the stomach falls into the crypts of the intestinal villi.
It's within those crypts that the food is transformed into erythroblasts, erythroblasts being the precursors to red blood cells. These erythroblasts in turn become the erythrocytes, which are the actual red blood cells.
The erythrocytes are taken up into the venules of the villi to the portal vein, directly through the liver to the inferior vena cava.
The inferior vena cava is the large vein that carries de-oxygenated blood from the lower half of the body into the heart. The blood then moves to the heart to the pulmonary system to pick up oxygen then back to the heart to general circulation.
Now, before I continue let me point out something here. It may seem far fetched that your body could simply transform one thing into another, such as elements of liquefied food into red blood cell precursors. But this process is far more common than you might think. In fact, your body engages in various forms of transformational activity all the time. That's because, for one thing, it takes less energy and is far more efficient than starting from scratch.
In other words, rather than creating a whole new element or molecule from scratch, your body very often simply transforms one element or molecule into another one. For example, your can turn sodium (Na) into potassium (K) and back again as the need arises. There is also a tremendous amount of biological transformation going on inside of you moment to moment. Meaning, all kinds of things (molds, yeast, bacteria, etc) changing from one form to another and then back again.
Now let's take this transformation idea and apply the concept to your blood. See if you don't find the following dynamic interesting. It just so happens that a hemoglobin molecule is nearly identical to a molecule of chlorophyll. The only difference is that hemoglobin has iron as its central atom whereas chlorophyll has a magnesium atom at its center.
So here's a question for you? What do you suppose is easier for your body to do; create a whole new hemoglobin molecule completely from scratch or simply transform a chlorophyll molecule into a hemoglobin molecule?
Most likely the answer is transforming a chlorophyll molecule into a hemoglobin molecule. And research scientists believe that this is exactly what your body can do. Evidence of this is born out by watching patients' red blood cell production dramatically increase when they switch their diet and begin eating very chlorophyll rich food. This shift can be seen within a matter of days even.
So, if there was ever a place for your red blood cells to form, the area of the small intestine makes the most sense. Here are some reasons why.
To read about a real life example of the powerful results that can be achieved by regenerating your intestinal villi, click on over to the next page.