Bell Ringer 9/3/13
 1. What is the function of a hot plate?
 2. Which science tool would you use for
accurate volume measurement?(2
possible answers)
 3. List something that you organize or
need to organize
 4. Besides by grade how are schools
organized?
Level of organization in
plants
Cells (smallest level)
Tissues
Organs
Organ Systems
Organisms (highest level)
Levels of organization
 Cells form tissues
 Tissues form organs
 Organs form systems
 Organ systems form organisms such as
a single plant
Living Things
 A living thing is an organism.
You are a multicellular organism!
-This means you are made of many cells
-Animals and Plants are multicellular
organisms
Plants- Are living things, they need soil,
water, air and sunlight to live.
What are living things?
Most living things share certain characteristics.
What characteristics do humans share?
We all have basic needs for food, water,
a place to live, and oxygen.
We are all made up of cells
Cells
All organisms are made of cells.
A cell is the smallest unit of living matter; the
basic unit of life.
You are made of blood cells, bone cells, skin cells,
and many others.
A plant also has different cells in its roots, stems,
and leaves.
Many-Celled Organisms have
different types of cells…
Plants have:
 Leaf Cells
 Root Cells
Stem Cells
Tissues:
 In your body, a single skin cell or blood cell does not
work alone.
 Cells work together in groups called tissues.
 A tissue -is a group of similar cells that
work together carrying out a certain job.
 For example, skin cells work together as skin tissue that
covers and protects your body. Other kinds of tissue in an
animal’s body include muscle, bone, nerve and blood.
Tissues
 Plant cells are also organized into
tissues.
The Tissues of a plant are:
 Xylem- carries water from roots to leaves
(located in the stem)
 Phloem- transports the sugars(food) and
other molecules created by the plant. (located
in the stem)
Organs
Throughout your body, tissues are grouped
together so they can work together.
 An organ is a group of tissues that work together doing
certain jobs.
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Organs In a plant are
1) Leaf
2) Stem
3) Roots
Plant organs
 A leaf -Make food for the plant using water,
 sunlight and air.
 A stem-Holds the plant up and carries water
to the leaves and flowers.
 The roots- Hold the plant in the
 ground. They absorb all the nutrients the
plant needs to grow.
Organ Systems
 When a group of parts work together, they form a
system.
 organ system-A group of organs working
together to perform a particular function
 Example:
 Your digestive system is an organ system:
 It contains your mouth, esophagus, stomach, small
and large intestines, and liver.
 Digestion breaks down food and absorbs nutrients
you need to live.
Plant Organs System
 The shoot system is above ground and
includes the organs such as leaves,
buds, stems, flowers (if the plant has
any), and fruits (if the plant has any).
 The root system includes those parts of
the plant below ground
Cells, Tissues, Organs,
and Systems
 A cell is the smallest unit of living matter;
the building blocks of living things.
 Tissues are groups of cells working
together to perform a certain job.
 Organs are groups of tissues that
perform a certain function.
 organ system: Organs working together
to carry out a certain life function are an
ORGANISM METAPHOR: Create a metaphor for an
organism and explain its four levels of organization.
Students can also illustrate their metaphor to
further reinforce the concept.
For example, if the organism is DISD then an organ
system might be the (insert school name), an organ
might be a classroom, a tissue could be a teacher,
and cells could be the students. Other organisms
could be Major League Baseball, a farm, a factory,
a country, or any other complex system.
DOL #4 9/2/13
1. In multicellular organisms, cells are
arranged into groups that work
together to perform a common
function. What are these groups
called?
A. Systems
B. Bones
C. Tissues
D. Joints
4. Like animals, plants have organ
systems that perform specific functions.
What are the organ systems in
plants?
5. Which of the following best
describes an organ?
A. A group of cells that work together to
perform a specific job
B. A group of tissues that belong to
different systems
C. A structure made up of a group of
2. Xylem is a tissue True or False?
tissues that work together to perform a
specific job
3.What is the function of a stem?
D. A body structure, such as muscles
and lungs