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Cell Structure and Function
Transcript of Cell Structure and Function
The smallest unit that can carry on all of the processes of life.
The Cell Theory
All organisms are composed of one or more cells.
Cells are the basic units of structure and function in an organism.
Cells come only from the reproduction of existing cells.
The diversity in cell shapes reflects the different functions of cells.
Cells differ in their size.
Some cells large enough to be seen with the naked eye.
Ex: Nerve cells are very long (like from your spinal cord to your foot).
Ex: a human egg cell is the size of the period at the end of this sentence .
Ex: most cells are about 1/500 the size of the period at the end of this sentence
Basic Parts of a Cell
aka: cell membrane
covers the cell's surface and acts as a barrier between the outside and inside
Cytoplasm or Cytosol
if it contains organelles
if it contains no organelles
The region of the cell that is within the plasma membrane that contains all the contents of the cell.
if organelles exist, this is where the DNA is found and is the organelle that controls the cells activities.
If organelles do not exist in the cell, the DNA floats in this region of the cell
Two Basic Types of Cells
organism that lacks a membrane-bound nucleus and membrane bound organelles
Ex: Bacteria and Archea
organisms made up of one or more cells that have a nucleus and membrane bound organelles.
groups of cells took on specific roles forming a
When groups of tissues performed particular jobs, they formed an
groups of organs that accomplish related tasks became a part of an
By: Diana Mansour
No membrane bound organelle
Contains cytosol (area that contains the contents of the cell
Contains an area in the cell called the nucleoid (where the DNA is located)
Has membrane bound organelles
conains a cytoplasm (area that contains the contents of the cell)
Contains an organelle called the nucleaus (the control center of the cell that contains the DNA)
Have a plasma membrane contain
DNA in the control center of the cell
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