Cell Structure & Function
description
Transcript of Cell Structure & Function
Cell Structure & Function
http://koning.ecsu.ctstateu.edu/cell/cell.html
Definition of Cell
A cell is the smallest unit that is capable of performing life functions.
Cell TheoryAll living things are made up of cells. Cells are the smallest working units of all
living things. All cells come from preexisting cells through
cell division.
“TYPICAL” ANIMAL CELL
“TYPICAL” PLANT CELL
Cell PartsOrganelles
Surrounding the Cell
CELL MEMBRANE Outer layer that controls
movement of materials into and out of cell
CELL WALLMost commonly
found in plant cells and bacteria
PLANT CELL
Provide Protection and Support
BACTERIA CELL
Inside the Cell
Nucleus Directs cell activitiesContains genetic material – chromosomes,
DNA
CytoplasmGel-like mixture makes up inside of cellHolds other organelles in cellSurrounded by cell membrane
MitochondriaFunctions in energy production through
chemical reactions
VACUOLESMembrane-bound sacs for storage,
digestion, and waste removalContains water solutionHelp plants maintain shape
CHLOROPLASTUsually found in plant
cellsContains green
chlorophyllWhere photosynthesis
takes place
Chloroplast Found in AutotrophsAutotrophic organisms make their own food
He’s Green. Is he an Autotroph?
HETEROTROPHSOrganisms that do not make their own foodRely on other organisms
Examples of CellsAmoeba Proteus
Plant Stem
Red Blood Cell
Nerve Cell
Bacteria
Two Types of Cells•Prokaryotic•Eukaryotic
ProkaryoticDo not have
structures surrounded by membranes
Few internal structures
One-celled, simple organisms, Bacteria
http://library.thinkquest.org/C004535/prokaryotic_cells.html
EukaryoticContain organelles surrounded by
membranesMost living organisms (you!)Plant Animal
http://library.thinkquest.org/C004535/eukaryotic_cells.html
AUGUST 30, 2013In you journal under the journal
guidelines, write today’s date & Cell Review
Draw & label only the type of Cell