Respiratory System

Multiple Choice

How many quarts of air do we move through our lungs every day?

• 20

• 1000

• 12000

• 10

Respiratory System (It's a Gas)

Bring ______ from the atmosphere into the bloodstream and remove ______ _______.

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​Main Function

-2 lungs
-Upper and Lower airways that conduct gas into and out of system.
-Alveoli
-Thoracic Cage
-Muscles for breathing

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​Components

Hotspot

Where is the trachea?

Hotspot

Where is the epiglottis?

Hotspot

Where is the pharynx?

Multiple Choice

True or False: The air we breathe is mostly Nitrogen.

• True

• False

Ventilation is the bulk movement of the air into and out of the lungs.

Respiration is the gas exchange process

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​Ventilation vs Respiration

Multiple Choice

When we breathe in...we call it inspiration?

• True

• False

Number of ventilations per minute = Respiration Rate
What is yours?

External Resp. = gas exchange in lungs between blood and external atmosphere
Internal Resp. = Oxygenated blood trasported internally

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​Gas Exchange

Multiple Choice

True or False: We have about 10-12 minutes of reserve oxygen in the body.

• True

• False

A series of branching tubes called BRONCHI...and BRONCHIOLES. They transport the atmospheric gas deep into our lungs to the small air sacs...ALVEOLI.

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​Airways and Lungs

Starts at the NOSE and ends at the VOCAL CHORDS located in LARYNX.

- heat and cools air to 37'
-humidifies air to 100%
-smell, produces sound etc..

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​Upper Airway

​Why do we breathe through our mouth?

The nose is responsible for nearly 1/2 to 2/3 of the total airway resistance in breathing. Therefore, most of us use our mouths to breathe when under stress. Also, the nares or nostrils rotate throughout the day as to which one is more dilated vs the other...which adds to the restriction.

Multiple Choice

Small hairs that flow in waves to move foreign particles away from the lungs towards the nose and throat.

• cilia

• mucal flowmagen

• wavous makeus

• miniscule keratine

Hollow cavity within bone of cranium.
-responsible for warming, cooling, and humidifying the air we breathe.

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The Sinuses

LARYNX to TRACHEA to RIGHT AND LEFT BRONCHI to BRONCHIOLES to ALVEOLI to CAPILLARIES

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​Lower Airway
upside down tree

​Interesting...

The angle of branching into the right main stem of the lung is between 20-30 degrees. The left is more pronounced at 40-60 degrees. What that means is that foreign objects are more likely to end up in the right lung...so if a small child gets choked or aspirated an object into the lung...start the search on the right.

You have about 300-600 million! 80 square meters in surface area!
-1st layer-surfactant
2nd layer- alveolar epithelium
3rd layer - interstitial space
4th layer - capillary endothelium

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​Alveoli

Multiple Choice

What do we call the "trunk" of the tracheobronchial tree?

• right mainstem bronchus

• left mainstem bronchus

• bronchiole

• trachea

Multiple Choice

If an object is aspirated into the airways, it is most likely to go to:

• the right lung

• the left lung

• the stomach

• the oropharynx

Multiple Choice

The alveolar layer that lowers surface tension to keep the alveoli expanded is the...

• surfactant layer

• capillary layer

• epithelium layer

• macrophage layer