Describe the structure of erythrocytes - Answer · Biconcave shape
· Incomplete cell.
· No nucleus or organelles
· Contain haemoglobin
· A lifespan of about 120 days
What benefits to Erythrocyte's shape? - Answer · increased surface-to-volume ratio
· cytoplasm close to the membrane
· able to squeeze through small vessel
Function of erythrocytes - Answer · Transport oxygen - picks up O from lung capillaries
and releases to tissue cells across the body
· Remove carbon dioxide - transports to lungs
· Maintain pH
How are Erythrocytes formed? - Answer · Formed in red bone marrow, under the control
of Erythropoietin, come from hematopoietic stem cells
Describe the composition of haemoglobin. - Answer · 4 Heme groups - red pigment
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