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(a)valves
(b)Biconcave shape to provide a large surface area for absorption of oxygen/carbon (iv) oxide;
Absence of nucleus hence pack more haemoglobin to carry sufficient oxygen/carbon (iv) oxide
Alter shape/pliable to be able to pass through the narrow lumen of the capillaries
Has haemoglobin for high affinity /high uptake of oxygen /carbon (iv) oxide
isaacmuthini answered the question on October 6, 2017 at 07:18
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