The pericardium is a tough, layered sac that wraps around the heart. When the heart beats, it slides easily within the sac. Normally, only 2 to 3 tablespoons of clear-yellow pericardial fluid are present between two layers, which lubricates the heart's movements within the sac.
Biewer. The Biewer (pronounced Bee-vair), also known as the Biewer Terrier, Biewer a la Pom Pon, Biewer Yorkshire Terrier, Biewer Yorkshire, or Biewer Yorkie is a variant of the Yorkshire Terrier.
Lovingly referred to as the Yorkie, the Yorkshire terrier is the ultimate cutie in small breeds. Not only are they tiny, some are even teacup! Adorable for dress-up or play, the Yorkshire terrier is a small breed with a big personality and perfect as a companion on the go.