Bisa minta refnya bahwa menurut biologi sel tubuh termasuk life creature?
From Wikipedia, the free encyclopedia
Jump to: navigation, search
Allium cells in different phases of the cell cycle
The cells of eukaryotes (left) and prokaryotes (right)
The cell is the basic structural and functional unit of all known living organisms. It is the smallest unit of life that is classified as a living thing (except virus, which consists only from DNA/RNA covered by protein and lipids), and is often called the building block of life. Organisms can be classified as unicellular (consisting of a single cell; including most bacteria) or multicellular (including plants and animals). Humans contain about 100 trillion (1014) cells. Most plant and animal cells are between 1 and 100 micrometres and therefore are visible only under the microscope.
The cell was discovered by Robert Hooke in 1665. 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 planet Earth at least 4.0–4.3 billion years ago.
The word cell comes from the Latin cella, meaning "small room". The descriptive term for the smallest living biological structure was coined by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks lived in.
kalo virus masih diperdebatkan ilmuwan apakah termasuk makhluk hidup atau bukan bcs virus butuh sel induk utk hidup dan berkembang....cmiiw