Why and when do the leucocytes perform diapedesis?

What is diapedesis?

What do we do with such spoilt food? Why?

Answer the following Why do we need different telescopes for the purpose?

When can haemoglobin perform its function?

Why do weeds threaten crop plants?

Why do new iron sheets appear shiny?

Why do the veins have valves?

Why do the blades of a pair of scissors have edges ?

Correct the following false statement and rewrite Leucocytes are coloured, enucleated and oval cells larger than RBCs.