Download Robert Hooke (1635-1703)

Robert Hooke (1635-1703)
-Freshwater, England
•  He discovered cells by looking at a cork
through a microscope
•  He thought it looked like honeycomb
•  He had actually discovered cells
•  He was the first to call them cells
•  He and Sir Isaac Newton were enemies
“By the help of microscopes, there is nothing so small,
as to escape our inquiry; hence there is a new visible
world discovered to the understanding.” – Robert
Hooke
AntonieVanLeeuwenhoek(1632-1723)
“Manhasalwaystobebusy
withhisthoughtsifanything
istobeaccomplished.”
-DutchscienFst
-Madeadvancesinmicroscopesand
achievedx250magnificaFon–an
expertmicroscopebuilder
-Wasthefirsthumantoobserve
microorganisms
-Usedoneofhisownmicroscopesto
lookatpondwater
-InpondwaterhesawFnyorganisms
thathecalledanimalcules
-Thefirstpersontoobserveanddescribe
humanredbloodcellsandbacteria
ByAri,Tom&James
Ma#hiasJacobSchleiden
(1804–1881)
•  Germanbotanist
•  Studiedprimarilycellsinplants
•  Proposedallplantsarecomposedofcells
•  Declaredthatthecellisthebasicbuilding
blockofallplantma#er
•  Showedthatthedevelopmentofall
vegetableFssuescomesfromtheacFvity
ofcells
•  Proposedthatallnewplants(plant
embryos)grewfromasinglecell
“Newcellsmusthavepropagatedfrom
nuclearoldcells.”
ByZiggy,SimoneandLuca
THEODOR SCHWANN
(1810-1882)
•  German physiologist
•  Defined the cell as the basic unit of not only plant but
also animal structure
•  His discovery linked the cells in plants and animals
•  Coined the term metabolism
•  Discovered Schwann cells in the peripheral nervous
system
•  Discovered and studied pepsin (digestive enzyme)
Quote: “The cause of nutrition and growth resides not
in the organism as a whole but in the separate
elementary parts – the cells.“
By Beth,
Sophia, &
Camden
Carl Nägeli (1817-1891)
•  Swiss botanist
•  Short after his graduation he became a science
genius
•  First to observe cell division during the
formation of pollen
•  One of the first scientists to distinguish the
plant cell wall from the inner components of
cells
•  The first to describe microsporidia (spore
forming unicellular parasites)
•  Developed an ‘inner perfecting principle’
“If faith begins where knowledge ends, then as the empire of
knowledge thus always increases in extent, that of faith decreases
as constantly.”
ByYoko,Phoenix&Charlie
Rudlof Virchow (1821 - 1902)
•  German physician
•  Proposed that all cells result from the division of
existing cells
•  Suggested the basic ideas of cellular pathology
•  In 1857 he was the first person to describe a type of
tumour called chordoma
•  Explained the mechanism of pulmonary
thromboembolism
“Every cell from a cell”