Download - 7 th Grade 3/12 Do Now:
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7th Grade3/12 Do Now:
Finish Cell Theory TimeLine
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Cell Theory:
Hooke – first person to discover and name cells
Schleiden – discovers plants are made of cells
Schwann – discovers animals are made of cells
Virchow – discovers cells come from other cells
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Cell Theory
How does Cell Theory answer these questions:– What makes something alive?– What do cells do?– Where do cells come from?
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THE CELL
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COMMON CELL TRAITS
A cell is the smallest unit that is capable of performing life functions.
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COMPARING CELLS
The size & shape of a cell relates to its function. (job it does)
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Prokaryotic Cells(proh KAYR ee yah tihk)
cells without membrane-bound structures
EX: bacteria
pond scum
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7th Grade3/13 Do Now
Color and label the picture of the animal cell and plant cell for the following parts of the cell:– Cell membrane – orange– Cytoplasm – sky (light) blue– Cell wall – yellow green
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Eukaryotic Cells(yew KAYR ee yah tihk)
cells with membrane-bound structures
EX: animals, plants, fungi and protists
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protects the cell gives shape is made of cellulose A cell wall is found in plants, algae, fungi, & most
bacteria.
CELL WALL
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CELL MEMBRANE
Outer covering, protective layer around ALL cells
For cells with cell walls,the cell membrane is inside the cell wall
Allows food, oxygen, & water into the cell & waste products out of the cell.
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CYTOPLASM
gelatin-like inside cell membrane constantly flows aka protoplasm
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CYTOSKELETON
scaffolding-like structure in cytoplasm
helps the cell maintain or change its shape
made of protein
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Organelle Foldable
Take a piece of paper and fold it lengthwise (hot dog).
At the top label: Cell Organelles On the same side cut the paper into 7 flaps
(approximately 4 lines) Label the 7 flaps: ribosome, chloroplast,
mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome.
On the inside, define and draw the organelle.
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Organelle Foldable
Take a piece of paper and fold it lengthwise (hot dog).
At the top label: Cell Organelles On the same side cut the paper into 7 flaps
(approximately 4 lines) Label the 7 flaps: ribosome, chloroplast,
mitochondria, endoplasmic reticulum, golgi bodies, vacuole and lysosome.
On the inside, define and draw the organelle.
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NUCLEUS
Directs all cell activities Contains instructions
for everything the cell does
These instructions are found on a hereditary material called DNA
Usually the largest organelle
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NUCLEAR MEMBRANE
separates nucleus from cytoplasm
controls movement of materials in & out of nucleus
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NUCLEOLUS
Aka “little nucleus” Found in the nucleus
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CHROMATIN
contains genetic code that controls cell made of DNA & proteins
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NUCLEUS
Directs all cell activities Contains instructions
for everything the cell does
These instructions are found on a hereditary material called DNA
Usually the largest organelle
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NUCLEAR MEMBRANE
separates nucleus from cytoplasm
controls movement of materials in & out of nucleus
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NUCLEOLUS
Aka “little nucleus” Found in the nucleus
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CHROMATIN
contains genetic code that controls cell made of DNA & proteins
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ENDOPLASMIC RETICULUM A series of folded membranes
that move materials (proteins) around in a cell
like a conveyor belt Smooth ER – ribosomes not
attached to ER Rough ER – ribosomes
attached to ER
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RIBOSOMES Make proteins Float freely or attached to the
endoplasmic reticulum (ER) Ribosomes are made in the
nucleolus
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GOLGI BODIES (GAWL jee)
Stacked flattened membranes
Sort and package proteins
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VACUOLES
Temporary storage spaces
Store food, water, waste
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LYSOSOMES (LI suh sohmz)
The word "lysosome" is Latin for "kill body." The purpose of the lysosome is to digest things.
They might be used to digest food or break down the cell when it dies.
Break down food molecules, cell wastes & worn out cell parts
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CHLOROPLASTS
Green organelles that make food
found only in plant cells
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CHLOROPHYLL
A green pigment that gives leaves & stems their color
Captures sunlight energy that is used to produce food called glucose
Glucose is a type of sugar
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MITOCHONDRIA Organelles that release
energy from food This energy is released by
breaking down food into carbon dioxide
AKA the powerhouse b/c they release energy from food
Some muscle cells have 20,000 mitochondria