Cell culture refers to the process of growing cells __________.
outside the body
Cell culture is a laboratory technique in which living cells are removed from an animal or plant and grown under carefully controlled conditions in glassware or plastic flasks. The cells are supplied with a nutrient medium, oxygen, warmth and a sterile environment, but the whole process takes place outside the original organism.
Cells cannot grow only in soil, because most animal cells need a liquid medium rich in amino acids, salts, sugars and growth factors, not soil. They also cannot grow without nutrients, since the medium itself must supply everything the cells would normally get from the body. And if the cells were kept inside the body, that would simply be their normal life, not culture.
Hence, the answer is outside the body.
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