act as the functional units of the respiratory system by passing oxygen into the body and carbon dioxide out of the body. Finally, the muscles of respiration, including the diaphragm and intercostal muscles, work together to act as a pump, pushing air into and out of the lungs during breathing.
The Ivory-billed Woodpecker (Campephilus principalis) is an extremely rare member of the woodpecker family, Picidae. It is officially listed as an endangered species, but by the end of the 20th century had widely been considered extinct until it was apparently sighted along the Cache River in Arkansas in 2004 and 2005.
The cassowary, the dinosaur bird of the Australian rainforests, looks like a massive prehistoric turkey walking on stilts with a huge helmet on its head.The Guinness Book of Records lists it as the world's most dangerous bird.hile the cute and cuddly Kola gets the all attention, the oddball cassowary, which is actually far more endangered than the koala, gets little funding and attention. With only 1,500 still left in the wild, this endangered rainforest bird faces certain extinction. It may not be long before it goes the way of the dodo.