Structures and Functions of Living Organisms Review

Which body system functions to transport signals/messages from the BRAIN to other parts of the body?

• digestive system

• respiratory system

• nervous system

• cardiovascular system

Unicellular organisms are a single cell that performs all life processes.

• True

• False

The structure of the digestive system is comprised of...

• esophagus

• intestines

• heart

• stomach

• mouth

These two body systems work together to help the body MOVE! Ex: skip, jump, run, walk

• muscular and skeletal systems

• circulatory and respiratory systems

• nervous and digestive systems

• digestive and muscular systems

To transport needed substances throughout the body and carry away wastes is the function of the __________ system.

Which body system takes oxygen into the body and releases carbon dioxide?

• nervous system

• respiratory system

• skeletal system

• muscular system

Why have multicellular organisms developed transport systems?

• Cells within a multicellular organism are too small for a direct exchange of substances.

• Cells within a multicellular organism are too far away from the environment for a direct exchange

  of substances.

• Cells within a multicellular organism are too large for a direct exchange of substances.

• Multicellular organisms have not developed transport systems.

Which of the following is an example of a multicellular organism?

• euglena

• bacteria

• dog

• yeast

Charlotte is observing a sample of pond water using a microscope. She sees an organism moving around in

the water and thinks it might be a multicellular organism.

Which of the following characteristics of the organism make it most likely to be a multicellular

organism?

• The organism is made of many cells.

• The organism has cells that perform specialized functions necessary for life.

• The organism has developed transport systems.

• All of the above

Bones provide protection to the lungs and heart.

• True

• False