cell theory - sps186.org theory (1).pdf · different types of cells have different jobs, this is...
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Cell theory
And types of cells
Levels of organization
Levels of organization Cell -- basic unit of life (Ex. blood cell, nerve cell, Collenchyma cells(plants))
○ Different types of cells have different jobs, this is called Cell Specialization
Tissue -- group of cells that perform a particular function
Organ -- groups of different tissues that work together (Ex. Heart, brain, skin)
Organ system -- a group of organs working together to perform a specific function
(Ex. Digestive tract)
Organism -- entire living thing that carries out all the basic life functions
Discovery of the Cell ● Anton van Leeuwenhoek● First described living cells as
seen through a simple
microscope
● 1600’s
Discovery of the Cell ● Discovered by Robert
Hooke ● He looked at a piece of cork
in a microscope and noticed
“tiny, empty chambers”.
● He called them “cells”.
● Used a compound
microscope
Discovery of the Cell ● Mathias Scleiden identified
the first plant cells and
concluded that all plants are
made of cells.
● Thomas Schwann made the
same conclusion about
animal cells
Cell Theory
1) All living
things are
made up of
one or more
cells and their
products
Cell Theory
2) The cell is the
simplest unit of
structure and
organization in
organisms.
Cell Theory
3) All cells come
from other cells;
they do not come
from non-living
matter.
Classification of Cells
Who doesn’t love a Venn Diagram?!
Page 172 in your textbooks may be of some assistance!
Prokaryotic vs Eukaryotic
Pg. 172
Prokaryotic Cells
● Simple, unicellular organisms (e.g. archaea and bacteria)
● No cell nucleus ● No membrane-bound
organelles
Eukaryotic Cells● Larger than prokaryotic
cells ● Contain a nucleus and
membrane-bound organelles
● Includes protists, fungi, animals, and plants
Single-Celled Eukaryotes
Multi-cellular Eukaryotes
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