The body system that brings air into the body, supplies oxygen to blood, and releases carbon dioxide.

• endocrine system

• respiratory system

• digestive system

• lymphatic system

The process of that takes oxygen into the body and releases carbon dioxide.

• sitting

• choking

• swallowing

• breathing

The process of taking air into the lungs (inhalation) and the process of breathing it out (exhalation).

• respiration

• digestion

• ingestion

• falling

A system of chambers through which air passes from the nostrils to the pharynx.

• heart

• ears

• eyes

• nose/nasal cavity

Windpipe; series of cartilaginous rings through which inhaled air moves from the larynx to the bronchi.

• femur

• trachea

• larynx

• masseter

Hair-like projections that contract to keep foreign particles out of passageways.

• yarn

• arms

• wax

• cilia

Area of the throat between the mouth and the vocal cords.

• jejunum

• windpipe

• pharynx

• lung

A cartilaginous structure on top of the trachea containing vocal cords; the voice box.

• pharynx

• larynx

• epiglottis

• trachea

Sac-like organs in the chest that allow the exchange of oxygen and carbon dioxide with red blood cells.

• lungs

• ears

• kidneys

• eyes

Either of two main branches of the trachea which lead to the lungs.

• nasal cavity

• epiglottis

• bronchus/bronchi

• alveoli