What are cells?
the structural and functional units of all living things
Cells are the basic building blocks of life that make up all living organisms, including plants and animals. They are the smallest unit of living matter that can perform all of the essential functions required to sustain life, including metabolism, respiration, and reproduction. Cells are characterized by their unique structure, which includes a cell membrane that surrounds the cell and separates it from its environment, a nucleus that contains genetic material, and various organelles that perform specific functions within the cell. There are several types of cells, including prokaryotic cells, such as bacteria, which do not have a nucleus, and eukaryotic cells, such as human cells, which have a nucleus and other complex organelles. The study of cells is called cell biology, and it is a fundamental area of research in biology and medicine.
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