Two air passages which allow air to enter the body are the cilia and aveoli !!!
The bronchi tubes allow the air to enter the lungs.
Mouth
nose
your mouth and nose
The mouth and the nose is where air comes in.
Air enters through your nose or mouth to your air sacs.
Mouth and nose
Air can enter the body by the mouth or the nose. Air then goes down the windpipe to the lungs where it can enter the bloodstream.
the air enters the bronchioles, and into the aveoli, which are small, one cell-thick sacks of air. These sacks are surrounded by tiny capillaries, which is how your blood retrieves its oxygen. From here, the oxygenated blood is carried back to the heart through the pulmonary vein and pumped into your body.
one train enters the tunnel at 7am the other at 7pm
They all enter the lung ... but the only one that quickly enters the blood is oxygen. Because oxygen is the one gas that has a higher partial pressure in "lung air" than its partial pressure in the "lung blood". Note that the blood's CO2 pressure is higher than the air in the lungs, so CO2 comes out of the blood into the lung's air.
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There are a number of places where the movie Body Shots can be downloaded, though it's not legal to do so in all of these places. From the places where it is legal, one of the highest rated is through the website Hulu.
One that enters, especially one that enters a competition.
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The element CARBON enters the body in two NATURAL ways. First is through eating and drinking. Almost all food that we eat contain the element carbon. As the ingested food reaches the digestive system, food is broken down into smaller pieces up until the molecular level. Some molecules are taken into the circulation, while others are excreted down as feces. Second is by breathing. Certain air molecules contain carbon. One major air molecule is CARBON DIOXIDE. Some molecules are inhaled, but usually, CARBON DIOXIDE should be excreted from the body. Unnatural ways when CARBON could enter the body is by medical intervention, as in intravenous injections, surgery, etc.