Re ga le du ca tio blue whale
Cells
Organisms come in a great variety of shapes pes and sizes, and can be found in all areas of ebas, s, the Earth. Some, like microscopic amoebas, scope are so small, we need to use a microscope hale, can to see them. Others, like the blue whale, reach lengths of over 25 meters – that’s hat’s about as long as a basketball court!
From microscopic amoebass to giant blue whales, all organisms are made e of cells. cells Cells C are the smallest units within an n organism that can carry out life processes. esse They are often esses. referred to as the ‘building of life’. uilding ng blocks block blo
Some organisms, diatoms s, like e parameciums, parameciu and bacteria, are made up of only a single cell. They are unicellular Others, like cellular ular organisms. organisms organis most of the you are familiar e plants nts and animals anim with, are made They are called e up of many cells. c multicellular ellular ar organisms. organisms.
amoeba
Did You Know?
Cells were first discovered in 1665 by the English scientist Robert Hooke. When observing cork under a microscope, he noticed a series of small boxes which he called ‘cells’.
Humans mans are multicellular multicellula organisms. Scientists multice estimate stimate that our ou bodies bod are made up of trillions of different cells that tha all play a role in helping our bodies es fu function.
AB
Activities 1.2 – 1.3
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