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