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2.6: CELL DIVISION, CELL DIVERSITY AND CELL DIFERENTIATION
specialised cells and tissues
Erythrocytes
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Erythrocytes carry
oxygenated blood
to different
organs
and
transport carbon dioxide
from
tissues
to
lungs
Erythrocytes
are derived from
adult stem cells
in the
bone marrow
smooth
surface
and
biconcave
shape
allows
it to fit
through
capillaries
easily
Erythrocytes
lack
organelles reducing
its
life span
large surface area
to
volume
ratio allows more
oxygen
to be
transported
in the
cells
the enzyme
carbon anhydrase
helps
transport carbon dioxide
from
tissues
to
lungs
Erythrocytes circulate for
4 months
before being
destroyed
in
liver
by
phagocytes
erythrocytes
biconcave
shape to increase
surface
area for
diffusion
and increase cell
flexibility
to fit through
capillaries
no
nucleus
so can have space to carry more
haemoglobin
to increase
transport
of
oxygen