The human body breathes out _________.

The ________ controls how you breathe.

The strong, curved muscle attached below the lungs to the lower ribs and backbone is called the _________.

The ________ _______ and the diaphragm change the space and pressure inside your body to allow you to breathe.

Exhaling is the ________ process of inhaling.

Compare and contrast involuntary breathing with voluntary breathing.

Name three reasons why your body needs oxygen.

The tube that leads from the pharynx to the lungs is called the ________.

The tube that leads from the pharynx to the stomach is called the ________.

The flap of tissue that covers the trachea to keep food out of the lungs is called the _____________.

The two small bands of elastic tissue that stretch across the inside of the larynx are called the ___________

________ and mucus trap dust, dirt, and other particles to help keep the respiratory system clean.