intro to cells

robert hooke (1665)

first person to see cells looking at cork and noted saw “a great many of boxes” he thought what resembled cells (rooms) of monastery

anton von leeuwenhook (1673)

observed living cells in pond water (called them “animalcules”. first person to observe bacteria (looking at gunk on teeth) made over 500 microscopes

mattias schleiden (1838)

botanist who observed tissues of plants were made of cells

Theodore schwann (1839)

zoologist that observed that tissues of animals were made of cells

rudolf virchow (1855)

reported that every living thing is made up of vital units called cells. predicted that cells come from other cells.

the cell theory

credit given to schleiden, schwann, and virchow. all cells come from pre existing cells. the cell is the basic unit structure and function. it’s the smallest unit that can preform life functions

cell shapes

cells have different shapes due to different functions. structure relates to function.

nerve cells shape

long extensions to send out and receive impulses quickly.

sperm cells shape

tails for moving

red blood cells

round, no large organelles take up space. b/c function carries oxygen (creates more space carrying oxygen) spoke cell (abnormal rbc)

prokaryotic cells

(“before nucleus”), no nucleus, simple cells lack organelles including nucleus, bacteria are the only prokaryotic

eukaryotic cells

(“true nucleus”) almost everything is this except bacteria. contains a membrane bound nucleus & organelles. more advanced than prokaryotic