Copper Wool- Skein, Pad, Wad - 3.5 Oz Skein Fine Grade 1/0 Grade - Made in USA! by Rogue River Tools. $ 16 99 Prime(4-5 days) FREE Shipping on eligible orders. More Buying Choices. $16.99(2 new offers) 4 out of 5 stars 2. Product Features. Great for cleaning and general use where steel or brass wool isn't preferred.
During inhalation or exhalation air is pulled towards or away from the lungs, by several cavities, tubes, and openings. The organs of the respiratory system make sure that oxygen enters our bodies and carbon dioxide leaves our bodies. The respiratory tract is the path of air from the nose to the lungs.
Inhaled and exhaled air. Inhaled [Inhaled: Breathed in. Exhaled [Exhaled: Breathed out. Gas exchange [Gas exchange: Oxygen passes through the capillary wall and into the tissues; carbon dioxide passes from the tissues into the blood. ] takes place by diffusion in the alveoli within the lungs. As a result the composition of inhaled and exhaled air is different.