7th Grade3/12 Do Now:

Finish Cell Theory TimeLine

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

Cell Theory

How does Cell Theory answer these questions:– What makes something alive?– What do cells do?– Where do cells come from?

THE CELL

COMMON CELL TRAITS

A cell is the smallest unit that is capable of performing life functions.

COMPARING CELLS

The size & shape of a cell relates to its function. (job it does)

Prokaryotic Cells(proh KAYR ee yah tihk)

cells without membrane-bound structures

EX: bacteria

pond scum

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

Eukaryotic Cells(yew KAYR ee yah tihk)

cells with membrane-bound structures

EX: animals, plants, fungi and protists

protects the cell gives shape is made of cellulose A cell wall is found in plants, algae, fungi, & most

bacteria.

CELL WALL

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.

CYTOPLASM

gelatin-like inside cell membrane constantly flows aka protoplasm

CYTOSKELETON

scaffolding-like structure in cytoplasm

helps the cell maintain or change its shape

made of protein

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.

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.

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

NUCLEAR MEMBRANE

separates nucleus from cytoplasm

controls movement of materials in & out of nucleus

NUCLEOLUS

Aka “little nucleus” Found in the nucleus

CHROMATIN

contains genetic code that controls cell made of DNA & proteins

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

NUCLEAR MEMBRANE

separates nucleus from cytoplasm

controls movement of materials in & out of nucleus

NUCLEOLUS

Aka “little nucleus” Found in the nucleus

CHROMATIN

contains genetic code that controls cell made of DNA & proteins

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

RIBOSOMES Make proteins Float freely or attached to the

endoplasmic reticulum (ER) Ribosomes are made in the

nucleolus

GOLGI BODIES (GAWL jee)

Stacked flattened membranes

Sort and package proteins

VACUOLES

Temporary storage spaces

Store food, water, waste

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

CHLOROPLASTS

Green organelles that make food

found only in plant cells

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

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