The arrangement of parts that make up something is called _________.

________ is the way that something works to achieve a task or serve a purpose.

What parts of your body work together to enable you to ride a bike?

An _____ is a body part made up of related tissues that perform a specific function.

A heart is a cell that moves oxygen from organ to organ.

• True

• False

Animals that live on land have ________.

Lungs are _________________________.

Land-dwelling animals take in carbon dioxide from the air.

• True

• False

Can lungs function in the water?

• Yes

• No

Compare lungs and gills. How are they similar? How are they different?