Email this
$15.98 DVD
|
(1810–82), German physiologist, generally considered the founder of modern histology, the study of the structure of plant and animal tissues. He was born in Neuss and educated at the universities of Bonn, Würzburg, and Berlin. He was (1838–48) professor of anatomy at the University of Louvain in Belgium; thereafter until his death he was associated with the University of Liège, also in Belgium, first as professor of anatomy (1848–58), then as professor of physiology. Schwann ascertained the physicochemical nature of life by applying the cell theory of the German botanist Matthias Jakob Schleiden to the evolution of animal life. He also demonstrated that the mature tissues of all animals are traceable to embryonic cells. While assisting the German physiologist Johannes Müller (1801–58) in the Anatomical Museum of Berlin, Schwann discovered pepsin, the digestive enzyme, in the stomach epithelium, or membrane tissues, of animals. He conducted valuable research on the processes of fermentation, putrefaction, and muscular and arterial contraction. His principal work is Microscopic Investigations on the Accordance in the Structure and Growth of Plants and Animals (1839; trans. 1847).
An article from Funk & Wagnalls® New Encyclopedia. © 2006 World Almanac Education Group. A WRC Media Company. All rights reserved. Except as otherwise permitted by
written agreement, uses of the work inconsistent with U.S. and applicable foreign copyright and related laws are prohibited.
|
ENCYCLOPEDIA:
SCHWANN, Theodor
SCHWANN, Theodor. (1810–82), German physiologist, generally considered the founder of modern histology, the study of the structure of plant and animal tissues. Schwann ascertained the physicochemical nature of life by applying the cell theory . . .
Theodore Roosevelt's Rise to Presidency
Video
4:12 min
-
Theodore Roosevelt's Acts and Legacy
Video
3:31 min
-
Theodore Roosevelt vs. Corporate America
Video
3:48 min
-
Theodore Roosevelt: Popular, Yet Powerful
Video
0:33 min
-
Theodore Roosevelt on the Square Deal
Video
1:31 min
-
Theodore Roosevelt's Rise to Presidency
4:12 min
In this The Presidents video, learn that after the Spanish American War, the United States was on an upswing and William McKinley chose none other than Theodore Roosevelt as his running mate; the ticket won, but tragedy struck.
In this The Presidents video, learn that after the Spanish American War, the United States was on an upswing and William McKinley chose none other than Theodore Roosevelt as his running mate; the ticket won, but tragedy struck.
Theodore Roosevelt's Acts and Legacy
3:31 min
In this The Presidents video, learn that in 1904, Theodore Roosevelt was elected president by the largest popular margin in American history at the time. Roosevelt told the country that he considered this his 2nd term and promised not to run again.
In this The Presidents video, learn that in 1904, Theodore Roosevelt was elected president by the largest popular margin in American history at the time. Roosevelt told the country that he considered this his 2nd term and promised not to run again.
Theodore Roosevelt vs. Corporate America
3:48 min
In this The Presidents video, discover that Theodore Roosevelt felt that America's greatest evil was too much power in the hands of corporate America. Five months into office, Roosevelt took on J.P. Morgan, the nation's most powerful financier.
In this The Presidents video, discover that Theodore Roosevelt felt that America's greatest evil was too much power in the hands of corporate America. Five months into office, Roosevelt took on J.P. Morgan, the nation's most powerful financier.
Theodore Roosevelt: Popular, Yet Powerful
0:33 min
Roosevelt's inexhaustible vitality and enthusiasm, his ability to dramatize himself and to coin vivid phrases, made him a popular president. His intellectual interests elevated the tone of American politics. Courtesy of The National Archives
Roosevelt's inexhaustible vitality and enthusiasm, his ability to dramatize himself and to coin vivid phrases, made him a popular president. His intellectual interests elevated the tone of American politics. Courtesy of The National Archives
Theodore Roosevelt on the Square Deal
1:31 min
On August 7, 1912, Theodore Roosevelt, was nominated for the presidency by the Progressive party, a group of Republicans dissatisfied with the re-nomination of President William Howard Taft.
On August 7, 1912, Theodore Roosevelt, was nominated for the presidency by the Progressive party, a group of Republicans dissatisfied with the re-nomination of President William Howard Taft.
ADVERTISEMENT
