CELLULAR

ORGANELLESCells are the smallest units of life.

That means individual cells are alive. http://goo.gl/lFWYN

Although cells are microscopic (really small), you can think of them as being their own living organism.

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Euglena

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SINGLE-CELLED

ORGANISMS

Here are three examples of organisms that are only made of ONE cell

Amoeba

Paramecium

In the same way that humans are made up of organs (heart, lungs, kidneys) cells are made up of organelles (nucleus, cytoplasm, ribosomes).

ORGANS&

ORGANELLES thinkstockphotos.com

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The cell membrane is present around ALL cells.

The cell membrane allows only certain substances to enter and leave (gateway)

CELL

MEMBRANE

The cell membrane is like a fence – it lets some things in and keeps some things out.

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The cytoplasm is a jelly-like material in which the parts of the cell constantly move.

The cytoplasm is the area outside the nucleus in which the organelles “float” around.

CYTOPLASM

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The nucleus controls all of the functions of the cell (control center).

NUCLEUS

The nucleus is like the “brain” of the cell.http://goo.gl/lFWYN

The nuclear membrane surrounds the nucleus.

The nuclear membrane allows substances to enter and leave the nucleus.

NUCLEARMEMBRANE

The nuclear membrane is like a window screen – lets air in and keeps bugs out.

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Chromosomes contain the instructions for all cell activities (located in the nucleus).

Chromosomes direct cell activities (made of DNA).

CHROMOSOMES

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Mitochondria are the "powerhouses" of cells.

Mitochondria produce most of the energy of a cell.

MITOCHONDRIA

The mitochondria are like the engines of a car.

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Ribosomes are tiny structures in the cytoplasm where proteins are made (the little dark specks).

RIBOSOMES

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The golgi body packages and moves proteins outside the cell.

GOLGI BODY

The golgi body is like the post office – receives, packages, and ships mail.

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The endoplasmic reticulum is like a series of "tunnels" that transport materials through the cytoplasm.

ENDOPLASMIC

RETICULUM

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Vacuoles (mostly found in plant cells) store water and nutrients for the cell.

VACUOLES

A vacuole is like a pantry or refrigerator – a place to store water and nutrients.

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Lysosomes contain digestive enzymes that break down food particles and waste.

LYSOSOMES

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