Cell Organelles and their Functions

CellsCells are the basic unit of all living

things.IF IT IS ALIVE, IT HAS CELLS!Cell Theory:

– All organisms are made up of one or more cells

– The cell is the basic unit of all organisms– all cells come from cells

Two Types of Cells

Parts in commonCell Membrane

CytoplasmOrganelles

DNA

This is a prokaryotic cell

Is a single celled organism that does not have a nucleus or membrane bound organelles.

Its DNA is locked in the cytoplasm.

Four “Classes” of Eukaryotic CellsThere are 4 classes of eukaryotic cells.

Will only discuss 2; Plant & Animal cells -

Plant cells Animal Cells

Cell Differentiation

Each kind of cell has a DIFFERENT job to do…it is specialized.

I am a heart cell!

I am a skin cell

When you hear the new vocabulary, just think of a TURTLE!

Cell Membrane

The cell membrane holds the cell together and allows nutrients into the cell.

It’s just like a turtle’s skin - the cell membrane is on the edge of a cell.

Cytoplasm

Cytoplasm is the watery gel (Jello!) inside a cell….it’s goop! It holds the ORGANelles.

Cytoplasm is like the turtles blood and other liquids.

Mitochondria Mitochondria is an ORGANelle that releases energy from

food. Every type of cell has a different amount of mitochondria.

There are more mitochondria in cells that have to perform lots of work, for example - your leg muscle cells. Other cells need less energy to do their work and have less mitochondria.

Mitochondria is like a turtle’s stomach.

Nucleus

The nucleus controls the cell. It is the largest organelle in the cell and

contains the cell’s DNA. The nucleus is like the turtle’s brain.

Nucleolus

Inside the nucleus is another organelle called the nucleolus.

It is responsible for making ribosomes. It is similar to all the neuron pathways inside

a turtle’s brain.

Chromosomes Chromosomes are inside the nucleus and

are made of genes (DNA). Genes decide the cells traits and activities

(heart cell, eye cell - such as color).

Nuclear Membrane

The nuclear membrane allows substances to pass in and out of the nucleus.

It surrounds the nucleus (the brain) like the turtle’s skull…protects it.

Vacuoles

Vacuoles are spaces in the cytoplasm (gel) where food and chemicals are stored

It’s like “fat” on a turtle

I am NOT fat…I’m just a little plump!!

Endoplasmic Reticulum

It is a network of membranes throughout the cytoplasm of the cell.

It helps to move materials around the cell. It is much like the blood vessels throughout a turtle.

Golgi apparatus

It is organelle in the cell that is responsible for sorting and correctly shipping the proteins produced in the ER.

The Golgi apparatus are stacks of membrane-covered sacs.

They also package proteins to be moved out of the cell. It’s like the digestive system of a turtle.  

VesiclesIt is a small sac that surrounds material

to be moved into or out of a cell

Ribosomes

Organelles that help in the synthesis of proteins. Some ribosomes are found in the cytoplasm, but most are

attached to the endoplasmic reticulum. While attached to the ER, ribosomes make proteins that the cell needs and also ones to be exported from the cell for work elsewhere in the body.

Lysosomes

• Lysosomes function as the cell's recycling compartment.

• Lysosomes contain digestive chemicals that help break down food molecules, wastes, and worn out cell parts.

• It’s similar to the turtle’s digestive system!

The lysosomes are stained RED!

Cell Wall

Cell Walls are only in plant cellsThey make the cell strong and rigidThey are like a turtle’s shell (but only

plants have them…that’s why grass stands straight up!)

Chloroplasts

Chloroplasts are only in plant cellsThey contain chlorophyll, which helps

make energy/food from sunlightChlorophyll is green in color.

I’m green…do I have chloroplasts?

What’s the Difference?

So what are two things that Plant cells have that animal cells don’t?

?

Chloroplasts & Cell Walls

This PowerPoint presentation has been adapted and modified by Dorothy Moore. Obtained from Biology PowerPoints: Cell Vocabulary, by Mr. Ryan submitted 12/09/06 at www.worldofteaching.com/biologypowerpoints.html