The function of the respiratory system is to inhale ____ gas and exhale the waste gas _____.

• oxygen, carbon dioxide

• carbon dioxide, oxygen

• nitrogen, carbon dioxide

Function means…

• A job

• No work

• Structure

It is made up of a group of organs that do a particular job.

• Cell

• Tissue

• Organ

• Organ system

Different body parts that perform specific functions.

• Cells

• Tissues

• Organs

• Organ system

It is an organ. When it pumps, it moves materials throughout the body (in the blood).

• Kidneys

• Brain

• Heart

• Lungs

Groups of cells that have a specific function.

• Tissues

• Organ

• Organ system

Cellular organization… (Correct order)

• Cell --> Tissue --> Organ --> Organ system --> Organism

• Organ system --> Organism --> Cell --> Tissue --> Organ

• Organism --> Cell --> Organ system --> Tissue --> Organ

The __________ system carries oxygen and nutrients to all parts of our bodies?

• respiratory

• circulatory

What is the main organ of our circulatory system?

• heart

• lungs

• skin

• liver

The heart is about the size of your ________.

• foot

• brain

• ear

• fist