the discovery of cells section 7.1 in your textbook important questions: what are cells? who...
TRANSCRIPT
The Discovery of Cells
Section 7.1 in your textbook
Important Questions:What are cells? Who discovered them? How can we view parts of cells? What is inside of cells?
COMMON CELL TRAITS
A cell is the smallest unit that is capable of performing life functions.
What happens in a cell to carry out life functions?
This video clip animates what happens in the cells. We will talk about some of these processes during the rest of our cell unit.
This clip is complicated…but just watch and appreciate the dynamic processes that occur in cells!
COMPARING CELLS
The size & shape of a cell relates to its function. (job it does)
Cellular Organization
Cells tissue organs organ systems organism
One or many cells
Some organisms are single celled = unicellular
Some organisms are made of many cells = multicellular
Cell Theory
All organisms are made up of 1 or more cells
The cell is the basic unit of organization
All cells came from preexisting cells
Who discovered cells? Who created the cell theory?
Important Biologists in the Discovery of Cells– Anton Van Leeuwenhoek (1600’s)– Robert Hooke (1600’s)– Matthias Schleiden (1830’s)– Theodore Schwann (1830’s)
Prokaryotic Cells(proh KAYR ee yah tihk)
cells without membrane-bound structures
EX: bacteria
pond scum
Eukaryotic Cells(yew KAYR ee yah tihk)
cells with membrane-bound structures
EX: animals, plants, fungi and protists
The cell theory was created by…
Observing cells and organisms Today we have many types of microscopes
we can use to view cells We will use the compound light microscope
in this unit to view cells
Let’s review how to use the microscope!