cell theory Flashcards
4 ADDITIONAL COMPONENTS:
THE CELL CONTAINS HEREDITARY
INFORMATION(DNA) WHICH IS
PASSED ON FROM CELL TO CELL
DURING CELL DIVISION.
2. ALL CELLS ARE BASICALLY THE
SAME IN CHEMICAL COMPOSITION
AND METABOLIC ACTIVITIES.
3. ALL BASIC CHEMICAL &
PHYSIOLOGICAL FUNCTIONS ARE
CARRIED OUT INSIDE THE
CELLS.(MOVEMENT,
DIGESTION,ETC)
4. CELL ACTIVITY DEPENDS ON THE
ACTIVITIES OF SUB-CELLULAR
STRUCTURES WITHIN THE
CELL(ORGANELLES, NUCLEUS,
PLASMA MEMBRANE)
ALL CELLS ARE PRODUCED BY THE
DIVISION OF PREEXISTING CELLS.
(VIRCHOW)(1858)
ALL ORGANISMS ARE COMPOSED OF
ONE OR MORE CELLS.
(SCHLEIDEN &
SCHWANN)(1838-39)
THE CELL IS THE BASIC UNIT OF LIFE IN
ALL LIVING THINGS.
(SCHLEIDEN &
SCHWANN)(1838-39)
1839- GERMAN PHYSIOLOGIST,
“ALL
ANIMAL TISSUES ARE COMPOSED
OF CELLS.
THEODOR SCHWANN:
GERMAN PHYSICIAN,
AFTER EXTENSIVE STUDY OF CELLULAR
PATHOLOGY, CONCLUDED THAT CELLS MUST
ARISE FROM PREEXISTING CELLS.
1858- RUDOLF VIRCHOW,
1838- GERMAN BOTANIST,
: “ALL PLANT
PARTS ARE MADE OF CELLS”
MATTHIAS SCHLEIDEN
OBSERVED A
FERTILISED HEN’S EGG (A
SINGLE CELL) COULD DEVELOP
INTO AN EMBRYO (MANY
SPECIALISED CELLS IN A
COMPACT MASS)
PURKINJE (1835)
names the cell nucleus
he also said that cell is the smallest unit of life
Robert Brown
NAMED THE FATHER OF MICROBIOLOGY
ANTON VAN LEUWENHOEK
HE CALLED THEM “ANIMALCULES”
ANTON VAN LEUWENHOEK
1673- USED A HANDMADE MICROSCOPE TO OBSERVE
POND SCUM & DISCOVERED SINGLE-CELLED ORGANISMS
ANTON VAN LEUWENHOEK
HE DESCRIBED THE CELLS AS TINY BOXES OR A
HONEYCOMB
ROBERT HOOKE
- 1665- ENGLISH SCIENTIST, , DISCOVERED
CELLS WHILE LOOKING AT A THIN SLICE OF CORK.
ROBERT HOOKE
*THERE ARE
CELLS IN
YOUR BRAI
30 BILLION
