As you're sitting here reading this you are either inhaling through your nose, mouth, or both. For humans our first structure of the respiratory system is the nose or mouth, which are both visible. Air then travels down the throat, also called pharynx, then passes the larynx which is our voice-box. Next air travels through the trachea to then enter the bronchial tubes which further branch into bronchioles making up the lungs. Branching in the lungs continues down to the alveolar ducts. These spongy like structures attach to capillaries where oxygen is picked up by the blood and transported throughout the body to all tissues by the circulatory system.
As you are sitting here and breathing in and out, air travels through all these structures instantaneously, and you can see the your diaphragm, which is above your stomach, expand outward as you inhale, and return back down as you exhale. Knowledge of the human respiratory system came from the Principles of Human Anatomy 10th ed. by Gerard Tortora.(Ch. 24)
http://www.mindfiesta.com/respiration
Respiration in an adult honey bee has a completely different system than both the human and fish that I have previously described. In fact a bee's respiration system has it's own name called the tracheal system. Bees have respiratory openings where oxygen enters through spirades. These openings branch numerous times, similar to human lungs, in order for oxygen to reach all organs of the body. http://animals.nationalgeographic.com/animals/bugs/honeybee/
These openings and the continual hard work of the bee to collect honey amount to the annoying buzzing sound most humans hear.
Bee's have trachea arms that widen, opening air sacs that are large but few in number. Small branches and tubes emerge from the air sacs to transport oxygen to the tissues. Oxygenation of the tissues can be sped up by contracting the air sacs which speeds up the transport of oxygen.
The Miracle of the Honeybee. The Bee’s Flawless Anatomy. Harun Yahya.
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