Zusammenfassung der Ressource
RED BLOOD CELL (RBC)
- also known as
Erythrocyte
- contain
haemoglobin (Hb)
- makes them red
- transports oxygen from
lungs to respiring tissues
- formation
- fetal stage
- liver cells
- birth onwards
- bone marrow
- shaped like a
biconcave disk
- dent on each
side increases
surface area
- oxygen can
diffuse quickly
into or out of
the cell
- very small
- diameter: 7 micrometer
- Hb molecule close
to the cell surface
- diffuse easily
- squeezes into the
capillaries
- brings oxygen as close as possible to the cells that require it
- no organelles
- more room for haemoglobin
- Short lived
- Flexible
- deform so as to pass
through narrow blood
vessels
- springs back to normal
shape later
- special cytoskeleton
- mesh like
network of
protein fibres
that allows it to
be squashed into
different shapes