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Cells are the basic unit of life. In the modern world, they are the smallest known world that performs all of life's functions. All living organisms are either single cells, or are multicellular organisms composed of many cells working together.
Some key cell types of the human body include stem cells, muscle cells, blood cells, bone cells, nerve cells, fat cells, sperm cells, and egg cells. The human body contains about 200 different types of cells
Each cell type in the human body is specialized for distinct functions, from stem cells capable of becoming other cell types to nerve cells that transmit signals. Cells like osteocytes maintain bone structure, blood cells transport oxygen and fight infections, and adipocytes store energy and regulate various bodily functions.
cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell is often a complete organism in itself, such as a bacterium or yeast. Other cells acquire specialized functions as they mature.
A cell is the smallest living organism and the basic unit of life on earth. Together, trillions of cells make up the human body. Cells have three parts: the membrane, the nucleus, and...
Cells are the fundamental units of life, serving as the structural, functional, and biological building blocks of all living organisms. Cells are microscopic structures that come in various shapes, ranging from spherical and cylindrical to cuboidal.
Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life. Each cell contains a fluid called the cytoplasm, which is enclosed by a membrane.
Cells are broadly categorized into two types: eukaryotic cells, which possess a nucleus, and prokaryotic cells, which lack a nucleus but have a nucleoid region. Prokaryotes are single-celled organisms such as bacteria, whereas eukaryotes can be either single-celled, such as amoebae, or multicellular, such as some algae, plants, animals, and fungi.
Cells may be used as a basis to describe organisms as unicellular or multicellular. Unicellular organisms are those that have only one cell, i.e. single-celled. Examples are prokaryotes and protists. Multicellular organisms are those possessing more than one cell. Examples are plants and animals.
Cells share many common features, yet they can look wildly different. In fact, cells have adapted over billions of years to a wide array of environments and functional roles. Nerve cells, for...