1. The place where life begins
Cells
The place where life begins

2. What is a cell?
A cell is the smallest functional and structural unit of all living organisms
This means that cells make up all living things!
An organism is any living thing
All organisms are made up of cells

3. Itty bitty cells Most cells are too small to see with your eyes alone
Why are they so small?
Cells are limited by their surface area
Cells take in nutrients and get rid of waste through their surface
If it’s volume grows too big, there will not be enough surface area to pass nutrients and waste through

4. Cell Theory All organisms are made up of one or more cells
The cell is the basic unit of all organisms
All cells come from existing cells

5. Three important people to cell theory
Anton van Leeuwenhoek
Saw cells from pond water under a microscope
Contributed to the first part of cell theory
Theodor Schwann
Determined animals were made of cells after Matthias Schleiden determined plants were made of cells
Concluded all organisms are made of cells
Concluded that the cell is the basic unit of life
Rudolf Virchow
Proposed that cells could only form from the division of other cells
Responsible for the 3rd part of cell theory

6. Important Vocab
Unicellular organism- 1 cell carries out all functions of life
Multicellular organism – cells have specialized functions and work together for the good of the organism

7. What do all cells have in common?
Cell membrane- a protective layer that convers the cells surface
Acts as a barrier
Controls movement of materials in and out of the cell
Cytoplasm- the area inside of the cell
Fluid
Contains the organelles

8. Continued
Organelle- small “bodies” in the cell used to preform specific functions
DNA – provides the codes for the instruction of all cell processes
Usually found in a membrane bound organelle called the nucleus

9. 2 Types of Cells Prokaryotic Eukaryotic
NO nucleus or membrane bound organelle
DNA is located in the cytoplasm
Contain ribosomes
Some contain flagella
Hair-like structures for movement
Smaller than Eukaryotes
Bacteria and Archaea
Contain a nucleus and other membrane bound organelles as well as ribosomes
Not all the same
Make up animals, plants, protists, and fungi
All multicellular organisms have eukaryotes
Can be unicellular