Tour de Cell

Goals of this lesson:

• 1. To understand the difference between 1. To understand the difference between plant cells and animal cells.plant cells and animal cells.

• 2. To learn the names and jobs of all cell 2. To learn the names and jobs of all cell organelles.organelles.

What are cells?

• Cells are the basic units of life.units of life.

• Every living thingEvery living thing is made up of cells!

What do Cells look like?

These are animal cells.

What do Cells look like?

These are plant cells.How many cells do you see here?

How Big Are Cells?

Click Here to see the size of cells

Diagram of CellsThe Zebra is made of trillionsof cells that work together. Therefore the Zebra is a goodexample of a MulticellularMulticellular Organism.

Unicellular Organisms• Some living things have only ONE cell.

Living things with only one cell are called unicellular organisms.unicellular organisms.

• Examples include:

Bacteria-

• EuglenaEuglena (another unicellular organism)

Organelles

• What are organelles?Organelles are small things that are Organelles are small things that are found inside of some cells.found inside of some cells.

• What do organelles do?Organelles help the cell do all of its Organelles help the cell do all of its important jobs.important jobs.

What do organelles look like?

Cells Alive Website

• Next, we are going to get a computer and use the web to look more closely at plant cells and animal cells.

What types of cells do we have in our

bodies?

1. Blood Cells

There are three types of cells found in human blood:

*Red Blood Cells(Red)

*White Blood Cells(Purple)

*Platelets(Blue)

2. Nerve Cells

3. Skin Cells

4. Muscle Cells

5. Bone Cells

6. Fat Cells

7. Stem Cells

Where are cells made in the

human body?

Cells are made inside of our inside of our bones in a substance called bones in a substance called

bone marrow.bone marrow.

What are cells made of?

How old do cells get?

The Organelles and what they do:

The Nucleus

• The brain of the cell. The nucleus controls everything that happens within the cell.

The Golgi Body

The golgi bodies receive materials from the endoplasmic reticulum and send them to other parts of the cell. They also release materials outside of the cell.

Vacuoles

In animals, the vacuoles store food, water, wastes, and other materials.

In plants, there is usually one large vacuole. This sac stores water, food, waste products, and other materials.

Lysosome

Lysosomes break down large food particles into smaller ones. They also break down and recycle old cell parts.

Endoplasmic Reticulum

• The endoplasmic reticulum is a maze of passageways that carry proteins from one part of the cell to the other.

Mitochondrion

• The mitochondria are the “powerhouses” of the cell because they produce most of the energy the cell needs.

Cell Membrane

• The cell membrane is the outside boundary of a cell. It controls what can enter or leave the cell.

Ribosomes

• Ribosomes are factories that produce proteins. The proteins are then shipped to the endoplasmic reticulum.

Cytoplasm

• The cytoplasm is the “soup” in which all the organelles are floating.

Now lets look at plant cell organelles:

Cell Wall

The cell wall is the wall that surrounds the cell membrane. This wall gives plants a stiff, boxlike shape. Cell walls protect and support plant cells.

A closer look at the cell wall:

Chloroplasts

• Chloroplasts capture energy from the sun and use it to produce food for the cell.

Here are the organelles that are found inside

bacterial cells:

Flagellum

• This is a long, whiplike structure that helps unicellular organisms move.