10
How are animals organised?
Living things
In multicellular organisms, such as animals, groups of cells work together
to carry out a variety of functions. Each type of cell has a specific function
within the organism.
1
Make sentences to describe the function of these three parts of the body.
heart
absorb oxygen from the air.
The function of the
lungs
is to
break down food.
stomach
pump blood around the body.
G
E T T I N G S T A R T E D
Systems
Systems are groups
of organs that work
together to perform
a function. For
example, our body
has a circulatory
system that is made
up of the heart,
blood, blood vessels
and lymph.
Cells
Multicellular organisms
have many types of cells.
The cells are different
shapes according to their
function. This is a muscle
cell. The shape of the cell
helps it combine with other
cells to form strong, flexible
muscles.
Organs
Organs
are made up of
different tissues. The
heart is an organ formed
frommuscle tissue that
pumps blood and fibrous
tissue that makes up the
valves.
Tissue
Cells join together to form
tissue
. Each type of tissue has
a specific function. This picture
shows long, thin muscle cells
forming muscle tissue.
