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In adults, RBCs are formed in……
a) liver                                   
b) red bone marrow
c) spleen                                               
d) both a and c

b

In adults, RBCs are formed in red bone marrow of ……
a) short bone                       
b) long bone
c) thin bone                          
d) all of these

a

In which of the following bones, RBCs are formed?
a) sternum                                            
b) ribs
c) vertebrae                          
d) all of these

d

The average life span of red blood cell (RBC) is …………days.
a) 7-12  
b) 30                      
c) 90      
d) 120

d

The dead RBCs are removed by…….
a) liver                                   
b) red bone marrow
c) spleen                                               
d) both a and c

d

Haemoglobin is a red protein found in RBCs carries…….
a) oxygen                                    
b) little amount of CO2
c) nutrients                  
d) both a and b

d