To detect heart sounds, the patient should be lying down and examined in a quiet room. Left-sided S3 is best heard at the apex of the heart (the lower pointed end of the heart) with the patient lying on his left side. It is a low-pitched sound and heard best using the bell of the stethoscope with light pressure.
Adorable animal families that will make you aww. Polystyrene is a type of polymer with thermoplastic properties produced from the petroleum-derived monomer, styrene. In solid form, it is a colorless and rigid plastic, but it may also be returned to a liquid state by heating, and used again for molding or extrusion.
Top 10 unbelievable historical concurrencies. Expanded polystyrene sheets, packing peanuts, foam-in-place and foam-in-bag, and polyethylene sheets are all types of packing foam. Both expanded polystyrene and packing peanuts are made from polystyrene. Foam-in-place and foam-in-bag are made from polyurethane. Polyethylene is available in flexible sheets. Each of these packing foams is best suited to protect as specific type of product during shipping.