In isometric growth the relative sizes of body parts remain in the same proportion as an organism gr

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Isometric Growth
x 1.5 x 1.5
x 1.5 x 1.5
In isometric growth the relative sizes of body
parts remain in the same proportion as an
organism grows, or in workers of different sizes.
Here by 1.5 for the head and rest of the body.
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Allometric Growth
x 2.0 x 1.5
x 2.0 x 1.5
In allometric growth the relative sizes of body
parts is not the same in different sized
individuals. Here, the head doubles in linear
dimension as the rest increases by 1.5. In ants,
the head is usually proportionately larger in
larger individuals.
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Allometric Growth
x 1.25 x 1.5
x 1.25 x 1.5
Here, the head only increases 1.25 in linear
dimension as the rest increases by 1.5. This does
not happen in ants, but does in humans.
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Allometric Growth in Humans
As a human matures, all parts of the body become
larger. But not at the same rate. The adult head
is relatively smaller.