Download Cell Theory

•Cells
are the smallest basic unit of
structure of living things.
•Cells are the basic units of function
and structure
•All cells come from other cells.
 Most
plants and animals are multicellular.
 Yeasts, protists, and bacteria are singlecelled.
 The structures in an organism from largest to
smallest are: organism, organ system, organ,
tissues, cells and organelles.
 The shape and structure of a cell is related
to its function.
 Cells
can perform respiration, take in
nutrients and produces wastes.
 Organelles are the small structures within a
cell that do special jobs.
 Substances pass in and out of a cell through
the cell membrane which all cells have.
 Genetic material is contained in the nucleus
 GOLGI
BODY: packages proteins before
they're sent on to their ultimate destination.
 RIBOSOMES: build proteins
 VACUOLES: large sacks that store wastes, and
transport materials
 MITOCHONDRIA: “power” the cell by
generating energy
 ENDOPLASMIC RETICULUM: Transports
proteins through the cell
 CHLOROPLASTS: photosynthesize (plants)
The idea that diseases are caused by
microscopic organisms, or germs
Bacteria can be found in the air, soil and in the
human body, everywhere
 An infectious disease is usually caused by
microbes, non-infectious disease can be caused
by genetics or the environment (cancer, asthma)
 The immune system protects the human body
from invading microbes
 Washing your hands is the most effective way to
prevent spread of infectious disease
 Microbes are cultured in a petri dish, in a
nutrient rich environment (agar) at the right
temperature

•Have a nucleus.
•Largest of the
Microbes.
Can be killed by
antibiotics
•No nucleus, only have a
Nucleoid without membrane
•Single-celled organism
•Bacteria can be found in the
air, soil and in the
human body.
•Second largest of the microbes
•Can be killed by antibiotics
•Smallest of the
Germs
•Cannot be killed with
Antibiotics
•Not a cell
 The
spread will increase over time
 Quarantine is when the infected people are
isolated from the community to prevent the
spread of infection.

Trade-offsPeople lose their freedom
Used to see objects that are not visible
with the human eye because they are
too small.
always handle a microscope with two hands by
the arm and base, start with the lowest power,
turn off the light and turn down the stage when
done
 Using a higher power objective will cause you to
only be able to view a smaller area,it will be
harder to find microbes and you may break the
slide.
 Multiply the eyepiece lens magnification by the
objective lens magnification to get the total
magnification.


Example: If the eyepiece is 10X and objective lens is
4X then the total magnification is 40X