Levels of Organization

Levels of Organization

Life

▪ Life is organized into different levels

based on size (from small to large)

This Photo by Unknown Author is licensed under CC BY

Organisms and Cells

▪ Some organisms are unicellular.

– This means they are made of one cell.
– Examples: bacteria and yeast

▪ Some organisms are multicellular.

– This means they are made of many cells
– Examples: humans, trees, fish

Organisms and Cells

• Unicellular organisms

can live and perfom
functions to live as one
cell

• However, multicellular

organisms have many more levels of
organization to make
sure the whole body
can work correctly,
even when it is doing
many things at the
same time.

Multiple Choice

All of life on Earth is organized into levels based on...

• their size

• whether they have lungs or not

• if they have a backbone

Multiple Choice

Unicellular organisms are made of

• 1 cell

• 1-2 cells

• 2 or more cells

• many cells

Dropdown

​

Select answer

is an example of an unicellular organism.

The 5 levels

▪ There are 5 levels of

organization in multicellular
organisms.

1.

Cells

2.

Tissues

3.

Organs

4.

Organ Systems

5.

Organisms

Multiple Choice

Click the correct levels of organization

• Tissues, Cells, Organs, Organism, Organ System

• Cells, Organs, Organ System, Organism

• Cells, Tissues, Organ, Organ System, Organism

• Cells, Tissues, Organ System, Organ, Organism

Dropdown

The ​

Select answer

is the most basic unit of all living things.

CELLS

▪ The cell is the most basic unit

of life.

▪ Cells are specialized by size and

shape depending on the job they do for the body

▪ Example: Nerve cells transmit

electrical messages through the nervous system

Multiple Choice

On the previous slide it stated that "Cells are specialized by size and shape for the job they do".

What word could we use to swap out and it will still be an accurate statement?

• Unique

• Same

• Measured

Unicellular organism

Paramecium

▪ This single celled organism is

made of only one cell and it
must perform ALL the jobs of
the organism in order to
survive.

This Photo by Unknown Author is licensed under CC BY-SA-NC

• gain energy

• remove waste

• process oxygen

• movement

TISSUES

Tissues are
made up of the
same type of
cells grouped
together to do a
specific job.

Dropdown

Tissues are made of specialized ​

Select answer

that work together to perform a specific function.

ORGANS

Organs are
made up of
different tissues
that work
together to do a
job

Examples:

Heart
Brain
Kidney
Lung

Stomach

ORGAN
SYSTEMS

An organ
system is a
group of organs
working
together to
perform a
specific
function

This Photo by Unknown Author is
licensed under CC BY

This Photo by Unknown Author is
licensed under CC BY-SA

Dropdown

Organs are made of specialized ​

Select answer

that work together to perform a specific function.

Dropdown

Organ systems are groups of ​

Select answer

that work together to perform a specific function.

ORGANISMS

Any living
individual thing.

Example: Unicellular
bacteria or
Multicellular animals,
plants and fungi

In the case of humans and other multicellular living things and Organism is made up of ALL the cells, tissues, organs and organ systems

Reorder

Reorder the following

• Cells

• Tissues

• Organs

• Organ Systems

• Organism

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Match

Match the following

• Basic unit of life

• Made of similar tissues

• made of specialized cells

• Any individual living thing

• A group of organs working together

cell

organs

tissues

organism

Organ system

• cell

• organs

• tissues

• organism

• Organ system