Respiratory System

Front 1

Alveoli (alveolus)

Back 1

Gas exchange structure within lungs; tiny air pocket with walls made of a membrane one cell thick, allowing for respiratory gas exchange.

Front 2

Bronchiole

Back 2

The passageway that branches from the bronchi into the separate lobes of the lungs; divides into smaller and smaller passageways that carry air into all portions of the lungs.

Front 3

Bronchus (bronchi)

Back 3

The passageway that branches from the trachea into the lungs, with one bronchus carrying air into each lung.

Front 4

Diaphragm

Back 4

A muscle layer that separates the region of the lungs (thoracic cavity) from the region of the stomach and liver (abdominal cavity) contraction increases the volume of the thoracic cavity.

Front 5

Epiglottis

Back 5

A flap of cartilage located over the entrance to the trachea (called the glottis); closes during swallowing to prevent food from entering the respiratory tract.

Front 6

Glottis

Back 6

The opening of the trachea through which air enters the larynx.

Front 7

Larynx

Back 7

A structure within the upper respiratory tract that contains the vocal cords.

Front 8

Lung

Back 8

Each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed.

Front 9

Nasal Passages

Back 9

Passage from the nostrils to the back of the throat through which air enters the body; serves to warm, moisten, and clean incoming air; lined with ciliated cells and mucus secreting cells (also known as nasal cavity).

Front 10

Nostril

Back 10

Either of two external openings of the nasal cavity in vertebrates that admit air to the lungs and smells to the olfactory nerves.

Front 11

Pharynx (Throat)

Back 11

Structure located just behind the mouth that connects to the mouth and nasal cavity to the larynx and esophagus; serves as the passageway for air into the respiratory system and for food and water into the digestive system.

Front 12

Thoracic Cavity (Chest Cavity)

Back 12

The cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart.

Front 13

Trachea (Windpipe)

Back 13

Tube that carries air from the nasal passages or mouth into the lungs.

Front 14

Pleural Membrane (Pleura)

Back 14

Double layered membrane that encloses the lungs.

Front 15

Residual Volume

Back 15

Amount of gas that remains in the lungs and the passageways of the respiratory system even after a full exhalation.

Front 16

Vital Capacity

Back 16

The total volume of gas that can be moved in or out of the lungs; tidal volume + inspiratory reserve volume + expiratory reserve volume.

Front 17

Tidal Volume

Back 17

Volume of air that is inhaled and exhaled in a normal breathing movement when the body is at rest.

Front 18

Expiratory Reserve Volume

Back 18

Additional volume of air that can be forced out of the lungs, beyond a regular (tidal) exhalation.

Front 19

Inspiratory Reserve Volume

Back 19

Additional volume of air that can be taken in by the lungs, beyond a regular (tidal) inhalation.

Front 20

Spirograph

Back 20

Graph representing the amount of air that moves into and out of the lungs with each breath.