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inhale

to breathe in oxygen and other gases

exhale

to breathe out carbon dioxide and other gases

oxygen

what every cell in the body needs in order to live and function

brain

controls how you breathe

involuntary breathing

automatic breathing

voluntary breathing

breathing that you think about and control for a short time

diaphragm

the strong curved muscle attached below the lungs to the lower ribs and backbone

chest muscles and diaphragm

change the space and pressure inside your body to allow you to breathe

esophagus

the tube that leads from the pharynx to the stomach

epiglottis

the flap of tissue that covers the trachea to keep food out of the lungs

vocal chords

the two small bands of elastic tissue that stretch across the inside of the larynx

cilia

tiny hairs in the nose that filter air

pharynx

throat

trachea

windpipe; the tube that leads to the lungs

larynx

the voice box; contains the vocal chords

affects pitch

thickness and length of the vocal chords

the respiratory system

our breathing system

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