The Organs of Respiration consist of the lungs and the air passages resulting in them. The lungs are two in quantity, and occupy the pleural chamber of the thorax, one on every side of the median line, being separated from one another by the center, the higher blood-vessels and the larger air tubes. Each lung is free in all instructions, except at the basis, which consists mainly of the bronchi, arteries and veins connecting the lungs with the trachea and coronary heart. The lungs are spongy and porous, and their tissues are very elastic. They are coated with a delicately constructed but robust sac, known as the pleural sac, one wall of which closely adheres to the lung, and the other to the internal wall of the chest, and which secretes a fluid which allows the inside surfaces of the walls to glide easily upon one another in the act of breathing. The Air Passages consist of the interior of the nose, pharynx, larynx, windpipe or BloodVitals SPO2 device trachea, and the bronchial tubes.

When we breathe, we draw in the air by means of the nose, through which it's warmed by contact with the mucous membrane, which is richly provided with blood, and after it has handed by way of the pharynx and larynx it passes into the trachea or windpipe, which subdivides into numerous tubes known as the bronchial tubes (bronchia), which, in flip, subdivide into and terminate in minute subdivisions in all of the small air areas within the lungs, of which the lung's contain tens of millions. A writer has said that if the air cells of the lungs were spread out over an unbroken floor, they might cowl an area of fourteen thousand square ft. The air is drawn into the lungs by the action of the diaphragm, a great, strong, flat, sheet-like muscle, stretched across the chest, BloodVitals SPO2 separating the chest-field from the abdomen. The diaphragm's motion is sort of as automated as that of the center, though it could also be remodeled into a semi-voluntary muscle by an effort of the desire.

When it expands, it will increase the dimensions of the chest and lungs, and the air rushes into the vacuum thus created. When it relaxes the chest and lungs contract and the air is expelled from the lungs. Now, before considering what occurs to the air within the lungs, let us look a bit into the matter of the circulation of the blood. The blood, as you realize, is driven by the heart, by the arteries, into the capillaries, thus reaching each part of the body, which it vitalizes, nourishes and strengthens. It then returns via the capillaries by one other route, the veins, to the guts, from whence it is drawn to the lungs. The blood begins on its arterial journey, vibrant crimson and wealthy, laden with life-giving qualities and BloodVitals SPO2 device properties. It returns by the venous route, poor, blue and dull, being laden down with the waste matter of the system. It goes out like a contemporary stream from the mountains

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Pub: 30 Sep 2025 20:28 UTC

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