Cardiac tamponade is pressure on the heart that occurs when blood or fluid builds up in the space between the heart muscle (myocardium) and the outer covering sac of the heart (pericardium). Alternative Names: Tamponade; Pericardial tamponade.
Koala Physical Characteristics. The koala is an arboreal (tree dwelling) herbivorous (plant eating) marsupial. Earlier European settlers had incorrectly labeled the koala as being a bear. Koalas do not live in the rain forests or in deserts. They live in tall eucalypt forests and low eucalypt woodlands.oala Physical Characteristics. The koala is an arboreal (tree dwelling) herbivorous (plant eating) marsupial. Earlier European settlers had incorrectly labeled the koala as being a bear. Koalas do not live in the rain forests or in deserts. They live in tall eucalypt forests and low eucalypt woodlands.
Koalas are 2 to 3 feet (60 to 85 centimeters) tall when fully grown. Their weight varies, depending on where the koala lives. Northern koalas weigh around 9 to 19 lbs. (4 to 8.5 kilograms) and southern koalas weigh around 15 to 29 lbs.(7 to 13 kg). Typically, males weigh 50 percent more than females, according to San Diego Zoo.oalas eat 3 hours per day, usually during the nighttime, and rest 16 to 18 hours a day, according to the Adelaide Zoo. They sleep so much because they need time and energy to digest their food. It takes a lot of energy to digest the fibrous leaves of the eucalyptus. Koalas are herbivores who eat only eucalyptus.