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.
Riparian brush rabbit and riparian woodrat (PDF 1MB) from the California Dept. of Pesticide Regulation. This publication is designed to help farmers avoid brush rabbits and woodrats. But it has lots of pictures and information.Visit the U.S. Fish & Wildlife Service's Homework Help page to learn more about endangered species. Photo credits: Picture at top of page by Heather Bell, USFWS. Linked photos by Laurissa Hamilton, a biologist with the Endangered Species Recovery Program.ut it has lots of pictures and information. Visit the U.S. Fish & Wildlife Service's Homework Help page to learn more about endangered species. Photo credits: Picture at top of page by Heather Bell, USFWS. Linked photos by Laurissa Hamilton, a biologist with the Endangered Species Recovery Program.