CELL THEORY

Plus de détails

Isabel Janeth Del R. López Mejía

par Lopez Mejía

Grade 11 Biology - SBI3U0-18

par SB - 11WS 649559 Louise Arbour SS

Research Design(by John W. Creswell)

par Nahomi Cuts

Diversity of Life

par Syed Kawnayn

CELL THEORY

THE OLD STATEMENTS OF THEORY

Cell come from preexisting cells

All living organisms are maded by cells

They are the basic unit of live

EUKARYOTES

Most Important Organells

Nucleus: It contains all the genetic code

Vacuole: help sequester waste productes

Mitocondria: generate of the energy needed to power the cells

prokaryotes

arche

bacterias

THE NEW STATEMENTS OF CELL THEORY

Each cell is a unique and unrepeatable open system, which exchanges matter and energy with its environment. All vital functions fit in a cell, so that a cell is enough to have a living being (which will be a unicellular living being). Thus, the cell is the physiological unit of life).

HISTORY

Cell theory is the most important and relevant part of biology that explains the constitution of living matter based on cells and the role that these cells play in the constitution of living matter. In 1665, the English scientist Robert Hooke, examining a cork slide under the microscope, noticed that it was formed by small polyhedral cavities which he called cells, meaning "little cells".

However, it was not until good optical microscopes became available, at the beginning of the 19th century, that it was found that all living organisms, both animal and vegetable, are composed of cells. According to the cellular theory, we have the possibility of concluding that: the cell is the structural and serviceable unit of living organisms, so that the essential activity of these is the result of the sum of the occupations of each of its cells, in the midst of which there is a coordination.