Half of the world's oxygen is produced via phytoplankton photosynthesis. The other half is produced via photosynthesis on land by trees, shrubs, grasses, and other plants. As green plants die and fall to the ground or sink to the ocean floor, a small fraction of their organic carbon is buried.
The walls of the small intestine absorb the digested nutrients into the bloodstream. The blood delivers the nutrients to the rest of the body. Once nutrients are absorbed by the intestine, they pass into the blood stream and are carried to the liver. The liver has the job of processing all the nutrients, vitamins, drugs, and other things we ingest and absorb each day.
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Answer:
Half of the world's oxygen is produced via phytoplankton photosynthesis. The other half is produced via photosynthesis on land by trees, shrubs, grasses, and other plants. As green plants die and fall to the ground or sink to the ocean floor, a small fraction of their organic carbon is buried.
The walls of the small intestine absorb the digested nutrients into the bloodstream. The blood delivers the nutrients to the rest of the body. Once nutrients are absorbed by the intestine, they pass into the blood stream and are carried to the liver. The liver has the job of processing all the nutrients, vitamins, drugs, and other things we ingest and absorb each day.
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