Why is AB blood type called the universal recipient?

Name the formed element at the pointer.

Name this instrument:  

What is this instrument “F” for? (not what it is called)     

Someone of blood type O+ can receive blood from what blood type ?(Give ONE only)

What is this instrument “F” for? (not what it is called)     

Someone of blood type O+ can receive blood from what blood type ?(Give ONE only)

Identify the indicated structure (valve).

Which WBC is agranular?  

What is this instrument “B”  for?