Transcript What is a Cell?

1. Please have these
Items on your desk.
AR
Book
Agenda
Science
Starters
Sheet
2- Science Starter:
Two vocabulary wordsChromosomes- A self-replicating body present in the
cells of higher plants and animals, especially
observable during mitosis.
Cell Cycle- Starts with the formation, then the growth
and development, and finally death. Each cell has their
own cycle, and it goes at it’s own pace.
Tuesday
December 1st , 2015
Day 1
Table of Contents Update
• Page 70 Learning goals for cells
•
and heredity (genetics)
11/30
• Page 71
12/1
Notes on cells
Cell Anatomy
Cell Parts & their Function
What is a Cell?
A cell is the smallest unit that is
capable of performing life functions.
It is the basic unit of living things.
Cell Theory
• All 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.
Examples of Cells
Amoeba Proteus
Plant Stem
Bacteria
Red Blood Cell
Nerve Cell
Cell Organelles
• Cell Parts are referred to as organelles.
Cell Wall
Most commonly found in plant cells & bacteria
Supports & protects cells
Cell Wall
Cell Membrane
• protective layer around all cells
• allows food and oxygen into the cell and waste products out of
the cell.
Cell Wall
Cell Membrane
Cytoplasm
• Gel-like material
• Surrounded by cell membrane
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
• contains instructions for everything cell does;
includes DNA
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
• Each cell contains thousands
• Make proteins which repairs cells
– (Think of it like a battery plant!)
• Found on ER & floating throughout the cell
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
Endoplasmic Reticulum
(ER for Short)
• Moves materials around in cell
– (Like a highway)
• Smooth type: lacks ribosomes
• Rough type : ribosomes embedded in surface
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
ER
Mitochondrion
• releases energy from food
– (Energy Plant)
• Controls level of water and other materials in cell
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
ER
Mitochondrion
Chloroplasts
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•
•
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Found only in plant cells.
Contains green chlorophyll
Where photosynthesis takes place
Helps plant cells make food.
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
ER
Mitochondrion
Chloroplasts
Vacuole
• membrane-bound temporary storage spaces
• Contains water solution
• Help plants maintain shape
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
ER
Mitochondrion
Chloroplasts
Vacuoles
Golgi Body
• Protein 'packaging plant'
• Move materials within the cell
• Move materials out of the cell
Cell Wall
Cell Membrane
Cytoplasm
Nucleus
Ribosome
ER
Mitochondrion
Chloroplasts
Vacuoles
Golgi Body
Lysosome
• A lysosome is basically a specialized vesicle
that holds a variety of enzymes. Used to
digest food or break down the cell when it
dies.
Bibliography
• http://www.scienceclass.net/PowerPoints/Cell_structure_functio
n.htm
• Glencoe Life Structure Book A