The Respiratory System

Contains little hairs that help filter the air you breathe in, blocking dirt and dust from getting into your lungs.

• mouth

• nasal cavity

• trachea

• bronchi

Opening, along with the nasal cavity, for breathing.

• nasal cavity

• mouth

• larynx

• alveoli

Back of the throat

• esophagus

• larynx

• pharynx

• bronchiole

Voice box; contains the vocal cords.

• larynx

• pharynx

• esophagus

• bronchi

Windpipe; takes air from your mouth to your lungs.

• pharynx

• larynx

• esophagus

• trachea

Elastic sacs with branching passages into which air is

drawn, so that oxygen can pass into the blood and carbon dioxide be removed.

• trachea

• bronchi

• lungs

• diaphragm

The branches of the trachea which take air into and

out of the lungs.

• bronchi

• bronchioles

• trachea

• larynx

Smaller branches of the bronchi.

• aveoli

• larynx

• pharynx

• bronchioles

Tiny air sacs in the lungs where gas exchange takes place. Oxygen in / carbon dioxide out.

• bronchi

• alveoli

• bronchioles

• lymph nodes

The muscle beneath the lungs which makes

breathing possible.

• diaphragm

• bronchi

• bronchioles

• alveoli