Ventilation is a passive process, which occurs naturally, without even thinking about it. Tim: It's really important that we understand that we do not suck air into our lungs. Ventilation is an absolute must, so it's really important that we understand the science behind it, and there's one thing in particular that's easily mistaken.ĭr. We're doing it every moment of every day, whether it's playing the saxophone or singing or even scuba-diving, we're all doing it. ![]() And our ability to control our breathing is a wonderful thing. And there's one more, and it's a really, really important one. To do this, they include.Īctually, I'll leave this one to you, Katie. and then expel carbon dioxide out of them.Īnd oxygen is required by every single cell in our bodies for respiration, and we use a number of key parts of the gas exchange system. "Ventilation" is the scientific word that we use for "breathing", and as you know, we take in oxygen into our lungs. Tim: All right, next, let's use what we've just heard there to figure out more about how we breathe - or what we should really be saying is how we ventilate. As these muscles relax, the volume in our chest cavity decreases, the inside pressure increases and moves air out. Two important structures for breathing are the intercostal muscles and diaphragm.Īs these muscles contract, the volume in our chest cavity increases, the inside pressure decreases and air moves in. When we breathe out, the process is reversed and other gases, now containing less oxygen and more carbon dioxide, leave our lungs. It travels down the trachea – or windpipe – into one of two bronchi and into bronchioles before entering one of millions of alveoli, where gaseous exchange takes place. ![]() When we breathe, air, made up mainly of nitrogen and oxygen, enters our body through the mouth and nose. Breathing - or ventilation - is the process of taking air into and out of the lungs.
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