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“Air flows in via our mouth or nose. The air then follows the windpipe, which splits first into two bronchi: one for each lung. The bronchi then split into smaller and smaller tubes that have tiny air sacs at their end called alveoli(Scientific American, 1).

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“Your respiratory system is the network of organs and tissues that help you breathe. This system helps your body absorb oxygen from the air so your organs can work. It also cleans waste gases, such as carbon dioxide, from your blood. Common problems include allergies, diseases or infections(Cleveland Clinic, 1).

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We have millions of alveoli in our lungs! These sacs have thin walls—so thin that oxygen and carbon dioxide can pass through them and enter or leave our blood. The blood transports oxygen to almost every part of the body. The blood also gives the carbon dioxide a ride back to the lungs(Scientific American, 1).

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The air sacs for the gas exchange
Endpoint of respiratory system

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“Branching airways”(Respiratory system in humans, 1).

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Organs that exchange gas

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The main airway

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Where sound is produced

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“Common passageway for air food and liquid”(Respiratory System in humans,1)

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Passageway for food and air

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Filters air

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Passageway for air

Traps foreign particles from contaminating us before we breathe them

Detects odors and smells

Filters and warms the air we breathe