a) What prevents blood in veins from flowing backwards? b) State two ways in which the red blood cells are adapted to their function.

      

a) What prevents blood in veins from flowing backwards?
b) State two ways in which the red blood cells are adapted to their function.

  

Answers


John
a) Presence of valves at regular intervals

b) - Have biconcave shape to increase surface area for packaging of more haemoglobin hence absorption of gases

-There's absence of nucleus and other organelles to increase packaging of haemoglobin

-There's presence of red pigment haemoglobin that has high affinity for oxygen
johnmulu answered the question on May 3, 2017 at 07:20


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