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 national and international trade in ivory of threatened species such as African and Asian elephants is illegal. The word ivory ultimately derives from the ancient Egyptian ab, Ã¢b (abu), Ã¢bu elephant Through the-latin ebor. or eburn Asia, wild elephant populations are now a fraction of what they were in historic times, and poaching of elephants continues. Elephants are now close to extinction in China, Vietnam, Laos PDR, Cambodia and Indonesia. Instances of theft of even domestic elephants for their ivory have been recorded in Myanmar.