Basic structural and functional units of all living organisms.
* They are the smallest independently functioning units in the structure of an organism.
* Cells can be found in all types of living organisms, including plants, animals, fungi, and microorganisms.
* Each cell is surrounded by a cell membrane, which separates the inside of the cell from its external environment.
* Cells contain specialized structures called organelles that perform specific functions within the cell.
* The two main types of cells are prokaryotic and eukaryotic cells. Prokaryotic cells, like bacteria, do not have a nucleus and lack membrane-bound organelles. Eukaryotic cells, found in plants, animals, and fungi, have a nucleus and membrane-bound organelles.
* Cells are responsible for carrying out various functions necessary for the survival and growth of an organism. These functions include metabolism, growth, reproduction, and response to stimuli.
* Cells are capable of communicating with each other and coordinating their activities to maintain the overall function of the organism.
* The study of cells is known as cell biology or cytology and has contributed greatly to our understanding of the fundamental processes of life and the development of various medical and biological technologies.
Cells
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give a
specific example of a cell and its function.
An example of a cell is a red blood cell, also known as an erythrocyte. The main function of red blood cells is to transport oxygen from the lungs to the body's tissues and remove carbon dioxide, a waste product, from the tissues. This process is facilitated by a protein called hemoglobin, which binds to oxygen in the lungs and releases it in the tissues. Red blood cells are disc-shaped and lack a nucleus, allowing for maximum space for oxygen-carrying capacity. They are produced in the bone marrow and have a lifespan of around 120 days before being broken down and recycled by the spleen.
An example of a cell is a red blood cell, also known as an erythrocyte. The main function of red blood cells is to transport oxygen from the lungs to the body's tissues and remove carbon dioxide, a waste product, from the tissues. This process is facilitated by a protein called hemoglobin, which binds to oxygen in the lungs and releases it in the tissues. Red blood cells are disc-shaped and lack a nucleus, allowing for maximum space for oxygen-carrying capacity. They are produced in the bone marrow and have a lifespan of around 120 days before being broken down and recycled by the spleen.
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