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.
Rating Newest Oldest. Best Answer: Polystyrene blocks and shapes are usually available at craft stores (but they'll be expensive and not large blocks usually), or you can use packing material (perhaps available at packaging stores, or from a friend, etc).eport Abuse. I am sharing here an online store link through which you can easily purchase all the products made from styrofoam or polystyrene such as polystyrene blocks, polystyrene sheets etc. Hope this would help you. Source(s): http://ecclestons.com/expanded-polystyre...