Create textured surfaces that can be painted over with oil or acrylic colors. A flexible, durable, soft body paste with an extra fine-texture; Made in USA. May be applied to a number of porous substrates, such as canvas, wood, cardboard, plaster and concrete.
The respiratory system is made up of organs and tissues that help you breathe. The main parts of this system are the airways, the lungs and linked blood vessels, and the muscles that enable breathing.
The lungs are a pair of organs in the chest that are primarily responsible for the exchange of oxygen and carbon dioxide between the air we breathe and the blood. Air enters the body via the nose (preferably) or the mouth. The air enters the main windpipe, called the trachea, and continues en route to each lung via either the right or left bronchus (plural=bronchi). The lungs are separated into sections called lobes, two on the left and three on the right.