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.
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. Koalas range in color from slate gray to reddish brown, according to Sea World. Koala fur isn't as soft as it looks. It is very coarse, like wool. This fur repels water to keep them dry in the rain. Koalas have large, sharp claws to assist with climbing tree trunks. Their hands and feet are built to curl around tree branches very tightly. Their hands have two opposable thumbs, providing better gripping ability. Koalas have big, fluffy ears and an excellent sense of hearing.