Monday, April 20, 2015
Sunday, April 12, 2015
DISCOVER OUR SOLAR SYSTEM
AMAZING MOMENT IN SOLAR SYSTEM ......
" Enjoooooooooy with this interesting trip"
Learn more about your body..
Learn more about a smallest part in your body
- The cell is the basic structural, functional, and biological unit of all known living organisms. Cells are the smallest unit of life that can replicate independently, and are often called the "building blocks of life". The study of cells is called cell biology.
- Cells consist of a protoplasm enclosed within a membrane , which contains many bio-molecules such as proteins and nucleic acids. Organisms can be classified as unicellular (consisting of a single cell; including most bacteria) or unicellular (including plants and animals). While the number of cells in plants and animals varies from species to species, humans contain about 100 trillion(1014) cells. Most plant and animal cells are visible only under the microscope, with dimensions between 1 and 100 micrometers.
- The cell was discovered by Robert Hooke in 1665, who named the biological unit for its resemblance to cells inhabited by Christian Monks in a monastery.The cell theory, first developed in 1839 by Matthias Jakob Schleiden and Theodor Schwann , states that all organisms are composed of one or more cells, that all cells come from preexisting cells, that vital functions of an organism occur within cells, and that all cells contain the hereditary information necessary for regulating cell functions and for transmitting information to the next generation of cells. Cells emerged on Earth at least 3.5 billion years ago.
Subscribe to:
Posts (Atom)