cytology Flashcards
(66 cards)
revolves around the concept the cell is the fundamental unit of life
cytology
the term “cell” was first introduced by an english scientist in 1667
Robert Hooke
hooke used one of the earliest microscopes to examine …
thin slices of cork from the bark of a tree
building blocks of life
cells
simplest units that exhibit the characteristics of life
cells
one of the basic principles of biology
cell theory
3 principles of cell theory
- cells are the basic unit of structure and organization in organisms.
- all living organisms are composed ofcells.
- cells arise from pre-existing cells.
“the cell is the basic unit of structure and organization in organisms.”
Robert Hooke
2 types of organisms
unicellular & multicellular
“all animals are made up of cells. ”
Theodor Schwann
“all plants are made of cells.”
Matthias Schleiden
“cells arise from pre-existing cells.”
Rudolf Virchow
“proto”
first
“plasm”
form
the protoplasm of a cell is made up of …
- cell membrane
- nucleus
- cytoplasm
aka plasma membrane
cell membrane
controls substances entering or leaving a cell
cell membrane
“gatekeeper of the cell”
cell membrane
described as a “fluid mosaic”
cell membrane
control center of the cell
nucleus
controls cell growth & repair of worn-out parts of cells
nucleus
double-layer membrane of nucleus
nuclear envelope
dense material in nucleus
nucleoplasm
largest structure in the nucleus of eukaryotic cells
nucleolus