Transcript Microscopes allow us to see inside the cell

Microscopes allow us to see
inside the cell
• Microscope is an
important tool.
• Cells are diverse (very
different)
• Plants & Animals
have EUKARYOTIC
cells.
Microscope is an important tool
• Light microscopes
(using lenses to bend
light & magnify) led to
discovery of Cell
Theory. Can magnify
up to 1000 times and
can view living cells.
• Scanning Electron
Microscope (SEM) &
Transmission Electron
Microscope (TEM) use
electrons to produce
images. Can magnify
up to 1 million times
but not view living
organisms.
CELLS ARE DIVERSE
• Every Cell has a protective covering, the CELL
MEMBRANE.
• CYTOPLASM is a gelatin-like fluid within the
membrane where most of the cell work is done.
• EUKARYOTIC cells have a nucleus containing
its genetic material. (most multicellular)
• PROKARYOTIC cells have its genetic material
float throughout the cytoplasm with no nucleus.
(most unicellular are prokaryotes)
• ORGANELLES are any part of a cell enclosed
within its own membrane.
PLANTS & ANIMALS HAVE
EUKARYOTIC CELLS
• Plant cells have CELL WALLS: tough, nonliving covering outside of c.membrane
• CHLOROPLASTS: found in plant cells; captures
sun’s energy to make sugar
• MITOCHONDRIA: in both plant & animal; use
oxygen to release energy from food/sugar.
• ENDOPLASMIC RETICULUM: system of
winding membranes outside of nucleus; used in
making & transporting proteins & parts of cell
membrane
PLANT & ANIMALS HAVE
EUKARYOTIC CELLS
• RIBOSOMES: receives data from nucleus to
build proteins to place in the E.R.
• VESICLES: small packages that break off of
E.R. to transport material to Golgi apparatus.
• GOLGI APPARATUS: finishes processing
materials made in the E.R.
• VACUOLES: store water, waste & food. Large
in plants, smaller in animal cells.
• LYSOSOMES: small vacuole that holds
digestive chemicals to break down materials in
cell(food) or old cell parts.
Identify the cell parts by placing the letter next to the correct organelle.
H
G
E
A
B
B
D
B
F
C
J
I
_____ Cell Membrane
_____ Cell Wall
_____ Chloroplast
_____ Central Vacuole
_____ Nucleus
_____ Endoplasmic Reticulum
_____ Ribosome
_____ Golgi Apparatus
_____ Mitochondria
_____ Cytoplasm