What important activity takes place in the lungs?

Which organ is made up of air-carrying tubes and tiny sacs?

Air can enter the body and travel to the lungs __________.

What is the purpose of the little hairs inside the nose?

What is the another name windpipe?

The major set of large set of nerves running down the spinal column or vertebrae. 

The major organ of the nervous system encased in the skull.

This is the job of the nervous system.

The part of the brain in charge of thinking and memory.

This is made up of the brain and spinal cord.