Page 93 - Science Class 08

PLANT AND ANIMAL CELLS v Cells carry out all body-func ons of an

Cells are basically similar, yet they perform organism.
different func ons. The nucleus of a cell v Func oning of an organism depends on the
controls all its ac vi es. However, there are func ons of its cells.
certain points of difference between animal Cells and Growth
cells and plant cells.
Cells keep growing in size and number. As a
For example, organelles called plas ds are
result of these two factors, overall growth of
there in plant cells but they are absent in the organism takes place. A child grows to be a
animal cells. young person and a seedling grows into a full
How They Differ? plant. Remember that every organism starts

Observe the pictures of the animal cell and the with a single cell that mul plies into many cells
plant cell and list the points of differences and the organism grows. Also, older cells keep
between them star ng from the outer sides. dying while new ones keep forming constantly.

It can be done as follows: Death of Cell
Structure The death of a cell affects the func oning of
Both the cells have vacuoles, mitochondria, the ssue of which it is a part that further

plasma and nucleus, but two things are affects the func oning of the organ of which
addi onal in plant cells. They are the cell-wall the ssue is a part. Needless to say, defec ve
and plas ds which are absent in animal cells. func oning of an organ affects the working of
all the body processes (systems) of which the
Size
defec ve organ is a part. Finally, the individual
Vacuoles in the plant cells are of a larger size (organism) itself is badly affected.
than those in the animal cells.
Number

In a plant cell, there is only one large vacuole. But
in an animal cell, there are many small vacuoles.

So, we can sum up some general points about
cells as follows:
v Cells are the basic structural units of all
living things.

v All cells have cell-organelles.
Dead Cell

Unicellular : An organism having a single cell to carry out its life-functions
Multicellular : An organism having a number of different cells to carry out life-functions
Vacuole : All space bounded by a membrane inside the cytoplasm of a cell

DNA : Deoxyribonucleic acid inside a cell that carries parental features to the children
RNA : Ribonucleic acid inside a cell and which is similar to DNA chemically

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