Download Cells Structure and Functions

Cells
Structures and Their
Functions
(Pages 38-45)
Cells
 Are
the smallest unit of life that
carries out all life functions
 Contain major structures inside
that perform these life functions
 Vary in size, but contain many of
the same structures
Organelles (Structures)
of the cell
Cell Membrane
 outside covering of the a cell that
controls what comes in and out
of the cell
 Analogy -
Nucleus
 contains
Genetic Material (DNA)
 is the control center of the cell
 Analogy -
Cytoplasm
gel-like fluid inside a cell
 the other organelles are
embedded in the cytoplasm
 Analogy 
Mitochondria
 uses
oxygen to release energy
from food
 sometimes called the
powerhouse of the cell
 Analogy -
Vacuoles
 act
as storage centers
Cell wall
 Provides
extra support and shape
for plant cells, it is made mostly of
cellulose
 Analogy -
Chloroplast
 food-making
cell
structures of a plant
Comparing Plant
and Animal Cells
 Plant
cells have a cell wall (to
give extra support and shape),
but animal cells do not.
 Plant cells have chloroplasts
(that enable plants make their
own food), but animal cells do
not.
Comparing Plant
and Animal Cells
 Plant
cells usually have one or
more large vacuole(s) (help
provide shape and allow the
plant to store water and food for
future use), while animal cells
have smaller vacuoles,if any are
present.
Comparing Body
Shapes of Bacteria
Classifying Bacteria






Kingdom Monera
Single celled
Smaller than plant or animal cells
Has a cell wall
Has a cell membrane
Has cytoplasm
Bacteria
Does
not have a nucleus
Genetic material is found
spread throughout the cell
3 Shapes of Bacteria



Round – called Cocci
Rod shaped – called Bacilli
Spiral – corkscrew shaped called Spirilla