Transcript Cell Organization

What Are Cells?
What are Cells?
1. A cell is a basic unit of structure and
function in all living things; therefore, all
living things are made up of cells!
What Are Cells?
2.Most living things are made up of many
cells or are multicellular and collectively
(all together) make up an organism (living
thing).
3.Some organisms, like bacteria are made
up of only one cell and are said to be
unicellular.
How is the cell of one-celled organisms
different from the cells in many-celled
organisms?
One-celled organism – the single
cell performs all life functions
Many-celled organism – the cells do
not work alone; each cell carries on
its own life functions while depending
on other cells in the organism;
Prokaryotic vs Eukaryotic Cells
Some organisms are said to be prokaryotic.
4. Prokaryotic organisms have cells that do not
have their genetic material (DNA) contained within a
nucleus. The genetic material floats within the
cytoplasm. Bacteria are prokaryotic.
Genetic material
(DNA)
Prokaryotic vs Eukaryotic Cells
Some organisms are eukaryotic.
5. The cells of eukaryotic organisms have their genetic
material (DNA) contained within a nucleus. Plants,
animals, and fungi are eukaryotic.
Genetic Material (DNA)
From Cell to Organism
Cells
Cells carry out all life processes.
6. The cells in your body are specialized to do
specific jobs.
Did you know that there are approximately 200
different types of cells in your body?
Some of the specialized cells in your
body include:
7. Muscle cells: help parts of your body
move
8. Nerve cells: receive and send messages within
your body
9. Bone Cells: support and protect your body
10. Immune Cells: help your body fight
diseases
11.Blood Cells: transport materials to all
parts of your body
12.Skin Cells: cover and protect your body
Cell Organization
In multicellular organisms, cell scientists learned that
cells that did the same job were similar in their size and
shape. They realized that cells have different structures
because of their function.
13. A group of cells that are similar and act
together to do a certain job make up a larger
part of your body called tissue.
Organs
14.Two or more tissues working together
form an organ.
Example: the heart is an organ made up
of cardiac muscle tissue, nerve tissue, and
blood tissues
Can you name some other organs?
Organ Systems
15.Two or more organs working together to
perform a certain function is an organ system.
Example: Your cardiovascular system is made
up of several organs working together including
at least, your nervous, circulatory , respiratory,
and muscular systems
16.Organism is made up of many organ systems
working together to carry out all of life’s functions.