recycled to the red bone marrow.
No. Most plastics are made of compounds and polymers that are not metabolized or degraded by most organisms, although some special organisms have been developed to attack certain plastics. Most plastics are degraded by sunlight.
Degraded System Performance
No
The Bicarbonate Buffer System
If they are not tears, then most commonly excreted from the eyes are mucous. This can be a result of allergies if you see a lot of them.
Most water soluble vitamins are excreted through urine. B 12 is the only water soluble vitmain that is excreted through feces.
Most drugs are excreted in the kidneys or filtered through the liver. You can find drugs in your bloodstream and your urine. Sometimes it is excreted through the sweat.
iron
Carbon dioxide is excreted from the lungs.
No, Unlike oxygen, Carbon Dioxide is mostly disolved in the blood plasma only about 23% is disolved in hemoglobin
most would be hemoglobin
Most drugs are either excreted in the urine (via the kidneys) - particularly if they are very water soluble - or sometimes metabolized - mostly in the liver.