15.Joel+Bollard

7/2/2012 __Robert Brown__ Who were they? Brown, Robert (1773-1858), a Scottish botanist What was their job? the Brownian motion What did they contribute to cell theory? Brown gave the name nucleus to the specialized body that regulates the functions of a living cell and was the first to identify it as a feature of most living cell. (he discoverd the Nucleus in the plant cell) Brown also began the study of plant fossils, using a microscope. Why was their contribution so important? Because he discoverd the Nucleus in the plant cell. __Robert Hooke__ Who were they? robert hooke (28th of july 1635 – 3 March 1703) What was their job?

english natural philosopher, archetect and polymath

What did they contribute to cell theory? discovered cells in a piece of cork, which he examined under his primitive microscope. Actually, Hooke only observed cell walls because cork cells are dead and without cytoplasmic contents. Why was their contribution so important? he created a design of astronomical instruments



//**__dogs digestive system.__**//

__//**Cows digestive system**//__

__Differences:__
- a cow has a rumen - a dog has a cacum and a cow dosent. - dogs have a pelvic bone. - dogs have a spleen. - cows have an abomasum. - cows have an omasum.

__Similarities:__
- both have a stomach. - both have a large and small intestine. - both have a mouth - both have a colon - both have an esophsugus