What’s the deal about cells?. Cells are the basic units of living things

What’s the deal

about cells?

The cell is the smallest unit of life that conducts all life functions.Cells work together to keep organisms alive.

Cells are the basic units of living things.

All cells come from other cells.

Classification of CellsProkaryotes

Were on earth first and for billion of years the only form of life.

Single cell organism with no defined nucleus.

Bacteria and cells living in pond surfaces and puddles are mostly prokaryotes.

Classification of CellsEukaryotes

Each cell has a defined nucleus

The nucleus is the largest most visible part and controls the cells activities.

Eukaryotic organisms are usually multi-cellular organisms – plant and animal cells

Classification of Cells

Classification of Cells

Eukaryotes

Plant and Animal Cells

Compare their forms

CELLS AND THEIR ORGANELLES

An organelle is…

specialized subunit

within a cell that has a

specific function

Plant Cells

Plant Cells have these organelles:

Rigid Cell WallsCell Membrane

VacuoleNucleus

MitochondriaCytoplasm

Green ChloroplastsRibosomes

Animal Cells

Animal Cells have these organelles:

Cell MembraneVacuoleNucleus

MitochondriaCytoplasmRibosomes

Functions of these organelles

help define the shape and give structure to

the plant.

Rigid Cell Walls

Functions of these organelles

Helps to control what enters and

leaves the cell

Cell Membrane

Functions of these organelles

Stores food, water, minerals and wastes,

they are more prominent in plant cells

Vacuole

Functions of these organelles

Controls most of the cell’s activity and

contains the genetic material called DNA

Nucleus

Functions of these organelles

Converts food energy into a form that the

cell can use

Mitochondria

Functions of these organelles

A gelatin-like substance that fills

the cell and contains many chemicals that

the cell needs

Cytoplasm

Functions of these organelles

Captures energy from sunlight and uses it to convert

carbon dioxide and water into

food

Green Chloroplasts

Functions of these organelles

Produce the protein for the cell

Ribosomes

Let’s get to work…

a plant cell

Create

and

an animal cell

with the organelles we talked about

Use the material at hand, cut out, draw, form or whatever is necessary.Label all organelles.

Find a way to show which organelles both cells have in common

Organelles Inside Cells:

• *Cell Membrane- thin flexible outer covering.

Controls what enters and leaves the cell. Known as

the “Gatekeeper”

*Cytoplasm- Gel-like fluid inside the cell made mostly of water. Other organelles are

inside the cytoplasm.

*Nucleus- “The brain”; Contains the genetic material called DNA, and is the control center

of the cell. Surrounded by a membrane just like the cell.

*Vacuole- “The refrigerator”, stores water, food and other wastes.

*Mitochondria- the “powerhouse”, where energy is created in a cell.

Organelles inside plant cells only

*Chloroplasts- sites where photosynthesis takes place in a plant

cell. They contain chlorophyll used to make

food.

*Cell Wall- Provides support, shape

and protection for plant cells.

Animal Cells

ADDITIONAL ORGANELLES FOR HONORS AND CHALLENGE CLASSES

Endoplasmic Reticulum-”The Highway”, helps to transport materials inside the cell.

Rough has ribosomes, smooth does not.

Lysosome- “The stomach” of the cell. It digests waste and other

materials. Sometimes digests the cell itself.

Ribosome- Makes protein inside the cell.

Golgi Body- Packages

proteins; “UPS”

Chromosomes- Located in the nucleus, where genetic

information is stored.

Nucleolus- Inside the nucleus; creates

ribosomes